Cara Delevingne taped her friend and Fifty Shades of Grey star Dakota Johnson belting out Natasha Bedingfield's "Unwritten" (aka The Hills theme song) -- watch the silly video!
This article originally appeared on Usmagazine.com: Dakota Johnson Sings The Hills' Theme Song "Unwritten" as Cara Delevingne Tapes Her Silly Performance: Watch the Video!
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