Mark Von Holden/Getty ImagesJust when we thought the list of megacelebs taking part in tomorrow's Hope for Haiti telethon couldn't get any bigger, along comes a certain one-named superstar.
Madonna has just been added to the bill...
The queen of pop will perform during the telethon in NYC. Previously announced performers will include Taylor Swift, Rihanna and Jay-Z, among others.
No word yet on what Madge will be singing. The telethon, spearheaded by George Clooney, will be broadcast on every major television network, including E! and simulcast on E! Online.
Some more celebs who have, according to sources, recently signed on for the telethon include Charlize Theron, the Jonas Brothers, Will Smith with Muhammad Ali, Meryl Streep, Tim Allen, David Archuleta, Alec Baldwin, Kristin Chenoweth, Cindy Crawford, Sacha Baron Cohen, John Krasinski, Jack Nicholson, Vanessa Hudgens and Ashley Tisdale.
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