Miley Cyrus & Ariana Grande Brighten PEOPLE’s Jingle Ball Photo Booth

updated 12/07/2013 AT 12:40 PM ET

originally published 12/07/2013 AT 2:30 PM ET

She may have twerked a bad Santa onstage, but by the time Miley Cyrus arrived backstage she had transformed from naughty to nice.

The 21-year-old pop sensation waved and blew kisses in PEOPLE’s exclusive photo booth at the KIIS FM Jingle Ball concert Friday night at L.A.’s Staples Center.

In these sneak-peek photos, Ariana Grande dazzled in bright holiday red and Robin Thicke celebrated his song-of-the-year Grammy nod announced just moments earlier at the Nokia Theatre L.A. Live across the street.

An MTV VMA twerk redo was not to be – Cyrus and Thicke just missed each other in the photo booth – but she more than made up for it at the concert, grinding with a boozy Saint Nick.

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