Hope for Haiti: Stars Line Up for Tonight's Telethon

Jan. 22, 2010— -- The stars are aligning for Haiti.

Madonna and Beyonce have just signed on for tonight's "Hope for Haiti" telethon, joining some of the biggest names in music and Hollywood, including Bruce Springsteen, Jay-Z, Bono, Brad Pitt, Meryl Streep and Leonardo DiCaprio.

"Hope for Haiti Now: A Global Benefit for Earthquake Relief," a two-hour telethon organized by actor George Clooney, will air live at 8 p.m. tonight on all four broadcast networks, dozens of cable channels and various Web sites.

Watch "20/20" at 10 p.m. ET after the telethon for the latest on Haiti

The worldwide response to the Jan. 12 earthquake, which may have claimed as many as 200,000 lives, has been overwhelming, with more than $1 billion in aid contributed so far. And tonight's star-studded telethon is expected to bring in even more.

Clooney told "Entertainment Tonight" that he's been up "three days straight" putting together the broadcast, and will officially donate $1 million from his own pockets during the telecast.

While Clooney holds down the fort in Los Angeles, Haitian native Wyclef Jean will host from New York. CNN's Anderson Cooper will report from Port-au-Prince throughout the night.

Stars will be filmed in multiple locations.

Here's a list of who's expected to perform:

New York: Bruce Springsteen, Sting, Mary J. Blige, Shakira, Jennifer Hudson and Wyclef Jean.

Los Angeles: Justin Timberlake, Christina Aguilera, Dave Matthews, Stevie Wonder, Taylor Swift, Keith Urban, Kid Rock, Sheryl Crow and John Legend.

London: Jay-Z, Bono and The Edge, Rihanna and Coldplay.