Buzz News Roundup, 3/12

Two more have joined the cast of My Sister's Keeper: Jason Patric will play the girls' father and Thomas Dekker (formerly Zach on Heroes) will play "the older sister's boyfriend and a fellow cancer survivor," writes Hollywood Reporter.
Online video service Hulu is now open to the public, USA Today reports.
ComingSoon has the news that five more actors have joined the cast of the Shopaholic movie, including John Lithgow and Kristin Scott Thomas.
Since Janet Jackson has the flu, Mariah Carey will appear on this weekend's Saturday Night Live, the Associated Press reports.
Arrested Development creator Mitch Hurwitz is writing an animated version of the Australian comedy Sit Down, Shut Up for Fox, writes Zap2It.
According to Billboard, Goldfrapp, Kate Nash and several others have joined the lineup for this year's Coachella festival.
The Gossip Girl Q&A from the upcoming Paley Festival will be webcast live on March 22, TV Guide reports.
Billboard reports that India.Arie will star in a Broadway show produced by Whoopi Goldberg.