Celebrities on Twitter Update

Alison Sweeney; Ashlee Simpson; Ashton Kutcher; Aubrey O'Day; Bjork; Brea Grant; Britney Spears; Brooke Burke; Brooke Hogan; Coldplay; Dane Cook; Dave Matthews; Demi Lovato; Demi Moore; Diddy; DJ AM; Donnie Wahlberg; Ellen DeGeneres; Elijah Wood; Emmy Rossum; Fran Drescher; Greg Grunberg; Guliana Rancic; Fred Durst; Heidi Montag; Holly Madison; Hugh Jackman; Ingrid Michaelson; James Kyson Lee; Jason Mraz; Jessica Simpson; Joel Madden; John Mayer; Justine Bateman; Kathy Griffin; Katie Price; Kayne West; Kelly Clarkson; Kim Kardashian; Kourtney Kardashian;Lady Gaga;Lance Armstrong; Lily Allen; Lisa Loeb; Luke Wilson; Mandy Moore; Marc Jacob; Margaret Cho; Mariah Carey; Martha Stewart; Meagan Good; Miley Cyrus; Mischa Barton; MC Hammer; Nick Cannon; Nicole Richie; Pete Wentz; Rachel Bilson; Rainn Wilson; Rumer Willis; Ryan Seacrest; Samantha Ronson; Sarah Bareilles; Selena Gomez; Shanna Moakler; Solange Knowles; Soleil Moon Frye; Spencer Pratt; Snoop Dogg; Taylor Momsen; Taylor Swift; Vanessa Hudgens; Whitney Port