"They're friends and she loves the song," a source tells Us. A second insider adds, "It's amazing. She comes out of a giant bear wearing a very provocative outfit." The prop is perhaps paying tribute to her raunchy "We Can't Stop" music video in which she danced suggestively with massive stuffed bears.
"Today's already the f-cking best day ever! Just wait till VMAs tonight," the 20-year-old star wrote via Twitter hours before the big show. For his part, 36-year-old Thicke later tweeted, "Who's ready for my performance at the @MTV #VMA's tonight? #VoteThicke."
Cyrus is nominated for Best Female Video, Video of the Year and Best Editing for "We Can't Stop." Thicke's "Blurred Lines" featuring T.I. and Pharrell is in the running for Video of the Year, Best Male Video and Best Collaboration.
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