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01/02/2014 04:59 pm ET Updated Jan 23, 2014

Katy Perry Celebrates The New Year With Private Vegas Concert

Didier Baverel via Getty Images

Katy Perry really was "Waking up in Vegas" this New Year's day.

The pop star performed a private concert at Las Vegas' Caesars Palace on Tuesday night for a group of invited guests. Costume designer Johnny Wujek was in the crowd and snapped this photo of Perry while she performed.

People reports that Perry put on an 80-minute show, which was a compilation of her greatest hits. After the concert, Perry and boyfriend, John Mayer, attended a private party at FIZZ Las Vegas.

Perry and Mayer have been in Vegas for nearly a week now. They saw Britney Spears' "Piece of Me" show, as well as a Fleetwood Mac concert, where Stevie Nicks dedicated the song "Landslide" to the "Roar" singer.

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