Lunchtime Lowdown: Rihanna Debuts Preview of New Music Video; Katy Perry Lights Up 'SNL'

Sept. 26 2010, Published 12:08 p.m. ET

%%{link_img}%%Take a sneak peek at Rihanna's new "Only Girl in the World" music video. (Just Jared)
Katy Perry lights up Saturday Night Live with a funny skit. (Pop Eater)
Heather Locklear finally drops ex-husband Richie Sambora's last name. (TMZ)
Whitney Port designs her own fashion line for Piperlime. (MTV)
Michael Douglas' new movie Wall Street rakes in the big bucks at the box office. (E! Online)