According to MTV:
Jean, a native of Haiti, George Clooney and CNN's Anderson Cooper will appear on the show, which will be broadcast from New York, London, Los Angeles and Haiti and feature more than 100 of the biggest names in film, television and music providing testimonials and answering phones. The two-hour program will air commercial-free across ABC, CBS, NBC, FOX, CNN, BET, the CW, HBO, MTV, VH1 and CMT on Friday at 8 p.m. ET/PT. The special will also air on PBS, TNT, Showtime, Comedy Central, Bravo, E! Entertainment Network, National Geographic Channel, Oxygen, G4, Centric, Current TV, Fuse, MLB Network, Epix, Palladia, SoapNet, Style, Discovery Health and Planet Green, as well as Canada's CTV, CBC Television, Global Television and MuchMusic. It will also air internationally on BET International, CNN International, National Geographic and MTV Networks International, available in 640 million homes worldwide. "Hope for Haiti" will be the first U.S.-based telethon airing on MTV in China. Facebook and Twitter are the official social media partners who will help to drive donations and tune-in to the telethon.
Apparently, George Clooney put the word out that he was hoping Pattinson would lend his Twilight Saga celebrity to raise money for the people of Haiti when he reached out to the Hollywood community for help in this worthy cause. Pattinson is the sole presenter from the London part, with a musical performance that features a collaboration between U2's Bono and The Edge with Jay-Z and Rihanna. The entire show will feature celebrity performers in the hundreds, including Justin Timberlake, Taylor Swift, Alicia Keys, Christina Aguilera, Shakira, Bruce Springsteen, Jennifer Aniston, Brad Pitt, Anna Kendrick, Zac Efron, Bradley Cooper, Chris Pine, Courteney Cox, David Arquette, Colin Farrell, Gabby Sidibe and Emily Blunt, among others.