
Lunchtime Lowdown: Katy Perry to Guest Star on 'How I Met Your Mother'

Jan. 6 2011, Published 7:00 a.m. ET
• Katy Perry is set to guest star on How I Met Your Mother later this season. (Huffington Post)
• Leighton Meester has an adorable new puppy! (Celebuzz)
• New Yorkers react to Lea Michele's latest PETA campaign. (PopEater)
• Kanye West's "Monster" gets the muppet treatment. (Just Jared)
• Demi Lovato wins two People's Choice Awards. (MTV News)
• Halle Berry and daughter Nahla run errands together in L.A. (PopSugar)
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