Now Playing: Comedian Joan Rivers Sedated Since Arriving at Hospital

Now Playing: Remembering Joan Rivers

Now Playing: Joan Rivers 1933-2014

Now Playing: Serena Williams' fiance shares about her unexpected 'pregnancy cravings' on Instagram

Now Playing: MLB stars descend on Little League World Series

Now Playing: Remembering activist and comedian Dick Gregory

Now Playing: Taylor Swift keeps fans guessing about possible new album

Now Playing: Sneak peek: the new 'Uncharted' video game

Now Playing: 'Real Live': The total solar eclipse

Now Playing: 'Real Live': Taylor Swift wins groping trial

Now Playing: Mom responds to backlash about her son's cheeseburger-filled photo shoot

Now Playing: The Salzburg festival

Now Playing: LeAnn Rimes on her new music and movie 'Logan Lucky'

Now Playing: Oscar-winning director on making of her new film 'Detroit'

Now Playing: Demi Lovato and Cheat Codes perform their hit song 'No Promises' live on 'GMA'

Now Playing: Demi Lovato rocks out in Central Park to her hit 'Sorry Not Sorry'

Now Playing: Demi Lovato dishes on the making of 'Instruction' and 'Sorry Not Sorry' music videos

Now Playing: Demi Lovato and Jax Jones perform 'Instruction' live on 'GMA'

Now Playing: Katy Perry announces delay for her 'Witness' tour

Now Playing: Richard Simmons argues tabloids knowingly published false information