Miley Cyrus and Justin Bieber took to the air, Katy Perry went to the studio, and Demi Lovato got close to new BFF Paulina Rubio.
Plus: Lucy Hale had a great night, Khloe andKourtney Kardashian made a friend, and Nina Dobrev went for a dip with Julianne Hough.
It’s all in this week’s roundup of Celebrity Twitpics!
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