Lady Gaga, Jada Pinkett Smith, Alicia Keys, Michelle Obama and Jennifer Lopez speak onstage during the 61st Annual Grammy Awards at Staples Center, Feb. 10, 2019, in Los Angeles. <br><br> Michelle Obama speaks to the audience during a surprise appearance at the 2019 Grammy Awards.

Michelle Obama greets children as she signs copies of her new book, "Becoming," during a book signing event at a Barnes & Noble, Nov. 30, 2018, in New York City. <br><br> The memoir is an in-depth, personal look at Obama's life before, during and after her family's eight years in the White House.

Michelle Obama arrives at the "When We All Vote" rally, in Miami, Sept. 28, 2018. <br> <br> Michelle Obama walked on stage to a rock star's welcome in the final stop of her "When We All Vote" campaign --a nonpartisan effort to encourage voting in this year's midterm election.

Former first lady Michelle Obama and actress/activist Tracee Lee Ross attend the United State of Women Summit at the Shrine Auditorium in Los Angeles, May 5, 2018. <br><br> Michelle Obama was a guest speaker at this year's United States of Women Summit in Los Angeles. The speakers discussed everything from education to childhood memories to what the future holds for the next generation of women.

Former first Lady Michelle Obama with artist Amy Sherald unveils Obama's official portrait at the National Portrait Gallery, Feb. 12, 2018, in Washington, D.C.

Former first lady Michelle Obama speaks onstage at The 2017 ESPYS at Microsoft Theater, July 12, 2017, in Los Angeles.

President Barack Obama, Eva Longoria, first lady Michelle Obama and Sasha Obama take part in the National Christmas Tree Lighting on the Ellipse, Dec. 1, 2016, in Washington.

First lady Michelle Obama and President Barack Obama wait for Prime Minister of Italy Matteo Renzi and Mrs. Agnese Landini to arrive at the North Portico of the White House, Oct. 18, 2016, in Washington.

First lady Michelle Obama speaks on the first day of the Democratic National Convention at the Wells Fargo Center in Philadelphia, July 25, 2016.

The first lady Michelle Obama and Missy Elliott join James Corden for Carpool Karaoke on "The Late Late Show with James Corden,"July 20, 2016.

Queen Letizia of Spain and Michelle Obama are seen at Zarzuela Palace, June 30, 2016, in Madrid.

First lady Michelle Obama and President Barack Obama come out from the White House for the arrival of Canadian Prime Minister Justin Trudeau and his wife Sophie Gregoire Trudeau for a state dinner at the North Portico, March 10, 2016, in Washington. Prime Minister Trudeau is on an official visit to Washington.

First lady Michelle Obama waves before the arrival of President Barack Obama before the State of the Union Address during a Joint Session of Congress at the Capitol in Washington, Jan. 12, 2016.

First lady Michelle Obama and President Barack Obama greet Pope Francis with daughters Malia and Sasha at Joint Base Andrews outside Washington, Sept. 22, 2015.

First lady Michelle Obama greets Eliana Pinckney, the daughter of the slain Reverend and South Carolina State Sen. Clementa Pinckney, as Pinkney's wife Jennifer looks on, during his funeral in Charleston, South Carolina, June 26, 2015.

First lady Michelle Obama stands with young students in the courtyard before an event as part of the "Let Girls Learn Initiative" at the Mulberry School for Girls, June 16, 2015, in London.

First lady Michelle Obama attends the annual White House Correspondent's Association Gala at the Washington Hilton hotel, April 25, 2015, in Washington.

Anaya Brodie, left, hugs first lady Michelle Obama during the White House's annual "Take Our Daughters and Sons to Work Day" in the East Room, April 22, 2015, in Washington.

Host Jimmy Fallon and first lady Michelle Obama during the "Evolution of Mom Dancing Part 2" skit, April 2, 2015.

First lady Michelle Obama speaks onstage during 2015 'Black Girls Rock!' BET Special at NJ Performing Arts Center, March 28, 2015, in Newark, New Jersey.

Michelle Obama hugs a member of the Akutagawa High School's taiko club during her visit to Fushimi Inari Shinto Shrine in Kyoto, Japan, March 20, 2015.

Talk show host Ellen DeGeneres takes the first lady Michelle Obama's #GimmeFive Challenge by learning a new dance in honor of the 5th Anniversary of the "Let's Move!" Initiative during a taping of "The Ellen DeGeneres Show," March 12, 2015, in Burbank, California.

The first lady reaches out to hold the hand of the President during an event marking the 50th Anniversary of the Selma-to-Montgomery Civil Rights marches at the Edmund Pettus Bridge in Selma, Alabama, March 7, 2015.

First lady Michelle Obama and President Barack Obama arrive for an event in the East Room of the White House, Dec. 7, 2014, in Washington. Obama and the first lady welcomed recipients of the 37th Annual Kennedy Center Honors to the White House to celebrate their contributions to the arts.

Image from Michelle Obama's Twitter account which appeared, May 7, 2014 with this caption; "Our prayers are with the missing Nigerian girls and their families. It's time to #BringBackOurGirls. -mo"

Daughters Malia, left, and Sasha joined their mother on a visit to the Great Wall at Mutianyu, China, March 23, 2014. Michelle Obama arrived in Beijing with her mother and daughters to kick off a seven-day, three-city tour to focus on education and cultural exchange.

First lady Michelle Obama gives a thumbs-up to US Army Ranger Sergeant First Class Cory Remsburg during the President's State of the Union Address, Jan. 28, 2014, in Washington.

The First Family speaks on stage in Washington at the National Building Museum, Dec. 15, 2013.

Host President Barack Obama and first lady Michelle Obama arrive at the 2013 Kennedy Center Honors reception honoring the 2013 recipients in the East Room of the White House in Washington, Dec. 8, 2013.

First lady Michelle Obama embraces Sesame Street characters Elmo and Rosita during an event announcing free licensing of Sesame Street characters to promote and market fresh fruit and vegetables by Produce Marketing Association growers, suppliers and retailers, as part of the "Let's Move Initiative," in Washington, Oct. 30, 2013.

President Barack Obama walks with his wife Michelle Obama and daughters, Malia, left, and Sasha, second right, through Lafayette Park to St John's Church to attend service, Oct. 27, 2013, in Washington.

First lady Michelle Obama places a rose into a crack of remains of the Berlin Wall during her visit to the Berlin Wall memorial in Berlin, June 19, 2013.

President Barack Obama dances with first lady Michelle Obama at the Commander-in-Chief Ball, Jan. 21, 2013, in Washington. President Obama was sworn-in for his second term as president during a public ceremonial inauguration earlier in the day.

First lady Michelle Obama and President Barack Obama attend the Kennedy Center Honors Reception at the White House in Washington, Dec. 2, 2012.

First lady Michelle Obama and President Barack Obama arrive for a rally at Alliant Energy Amphitheater in Dubuque, Iowa, Aug. 15, 2012.

First lady Michelle Obama announces the Best Picture Oscar to Argo for the 85th Annual Academy Awards, live from the Diplomatic Room of the White House, Feb. 24, 2012, in Washington. Obama revealed the award via satellite for the live show being held in Los Angeles.

Current First Lady, Michelle Obama, joined former first ladies Laura Bush, Hillary Clinton, Barbara Bush and Rosalynn Carter at the dedication ceremony for the George W. Bush Presidential Center in Dallas.

First lady Michelle Obama with her daughters, Malia, left, and Sasha as they pose for photographs with former South African President Nelson Mandela, right, at his home in Houghton, South Africa, June 21, 2011. Michelle Obama is on her first solo trip to Africa.

First lady Michelle Obama, President Barack Obama, Queen Elizabeth II and Prince Philip, Duke of Edinburgh pose for a photo as they arrive to Buckingham Palace, May 24, 2011, in London. President Barack Obama, and his wife Michelle are in the UK for a two day state visit at the invitation of Queen Elizabeth II.

Mark Kelly, husband of U.S. Rep. Gabrielle Giffords, holds Michelle's hand during the "Together We Thrive: Tucson and America" honoring the Jan. 8, 2011 shooting victims, at McKale Memorial Center on the University of Arizona campus, Jan. 12, 2011, in Tucson, Arizona.

President Barack Obama and his wife, Michelle Obama, walk on the south lawn after arriving back at the White House, Oct. 2, 2009, in Washington.

First lady Michelle Obama harvests vegetables from the White House Kitchen Garden with students from Bancroft Elementary School on the South Lawn of the White House, June 16, 2009. She later sat down to a meal harvested from the garden to focus attention on health and nutrition.

Former first lady Nancy Reagan visits first lady Michelle Obama at the White House, June 3, 2009.

Oprah Winfrey and first lady Michelle Obama attend Time's 100 Most Influential People in the World Gala at Rose Hall Jazz at Lincoln Center, May 5, 2009, in New York.

President Barack Obama and first lady Michelle Obama, with their daughters, Malia and Sasha introduce their new dog, a Portuguese water dog named Bo, to the White House press corps at the South Lawn of the White House, April 14, 2009, in Washington.

Britain's Queen Elizabeth II and first lady Michelle Obama embrace at Buckingham Palace in London, April 1, 2009.

First lady Michelle Obama serves lunch at Miriam's Kitchen, which provides meals, case management services and housing support to nearly 250 homeless men and women, March 5, 2009, in Washington.

First lady Michelle Obama is seen in the gallery for President Barack Obama's first Joint Session of Congress, Feb. 24, 2009.

President Barack Obama and first lady Michelle Obama walk in the Inaugural Parade, Jan. 20, 2009, in Washington. Obama was sworn in as the 44th President of the United States, becoming the first African-American to be elected President.

The Official portrait of first lady Michelle Obama is seen here in this 2009 file photo.

President-elect Barack Obama and his wife Michelle walk off the stage after Obama gave his victory speech during an election night gathering in Grant Park, Nov. 4, 2008, in Chicago.

Democratic presidential candidate Sen. Barack Obama and his wife Michelle Obama bump fists at an election night rally at the Xcel Energy Center, June 3, 2008, in St. Paul, Minnesota. Obama clinched the Democratic presidential nomination following today's primaries in South Dakota and Montana.

Democratic presidential hopeful Sen. Barack Obama, D-Ill., his wife, Michelle Obama, and their daughters, Sasha, 2nd right, and Malia, take the stage during a rally near the Iowa state capitol building, May 20, 2008, in Des Moines, Iowa

Michelle Obama arrives for an interview, Oct. 27, 2008, for "The Tonight Show with Jay Leno."

Michelle Obama watches her husband, Democratic presidential candidate Senator Barack Obama, speak at a town hall style meeting at the Montgomery County Community College, April 21, 2008, in Blue Bell, Pennsylvania.

Democratic Presidential Candidate Senator Barack Obama with his daughters, Malia and Sasha, and wife Michelle visit the Iowa State Fair, Aug. 16, 2007, in Des Moines, Iowa.

President Barack Obama and Michelle Robinson (later Obama) on their wedding day, Oct. 18, 1992, in Chicago.

Michelle Robinson (later Obama) is seen here in her junior year in 1980 at Whitney Young High School, Chicago.