Lunchtime Lowdown: Rihanna Adresses Following Chris Brown on Twitter; Willow Smith Releases Sneak Preview of "Rock Star"

May 15 2011, Published 7:21 a.m. ET

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Rihanna defends following ex-boyfriend Chris Brown on Twitter to one of her fans. (E! Online)
Willow Smith releases a sneak peek at her new single, "Rock Star." (Pop Eater)
Glee's Chord Overstreet steps out in L.A. at KIIS FM's Wango Tango with a darker hair style. (Just Jared)
Pippa Middleton enjoys a relaxing boat ride in Spain. (TMZ)
Colin Farrell teams up with Ellen Degeneres for a scary prank on her talk show. (Huffington Post)