Britney Spears Begins Piece Of Me Residency In Vegas

Britney Spears has got the ball rolling on her two-year Las Vegas residency - in front of a host of her celeb mates.

The 32-year-old star made her comeback with the opening night of her Miley Cyrusand fellow pop star Katy Perry were among the VIP guests watching.

True to her word, Britters poured on the cheese, racing through a whopping 23 hit singles in just 90 minutes.

"Cheesy is good," Brit said in her E! documentary, which aired on Sunday night in the US and chronicled the development and rehearsals of the show. "Extra cheese and simplicity."

We're not so sure about the "simple" part of that. Spears delivered on her signature style of larger-than-life production, blaring beats and rapid-fire dance moves, whirling through seven costume changes and even a couple of wig changes.

Spears donned her signature curly blonde bob for Circus, but pulled out a sleek, brunette hairdo for ...Baby One More Time.

Kicking things off with Work Bitch, Spears set the tone for the high-octane event early. If you weren't on your feet dancing on your own accord, she was going to make you.

Several times she teased the audience: "I can't hear you," and the 7,000-seat auditorium obliged her every whim.

For the nostalgic Britney fan, rejoice in the fact that Piece of Me is more of a look backwards than forwards.

During Gimme More, Spears appeared to recycle a great deal of choreography from her 2007 Video Music Awards performance.And on Circus, she offered basically a live rendition of her Francis Lawrence-directed music video.

For Everytime, she was held high above the stage on a set of wings - a move reminiscent of her Oops!... I Did It Again Tour.

There was chair dancing to boot, but sadly not during Stronger.

There was plenty of new glitz and glamour to keep things "fresh", as Brit likes to say. Not only did we see waterworks during Toxic (and the epic tree swing, as already seen on TV), but also during Slave 4 U.

Spears joked to the audience: "I got so wet! Thank you."

Though she opted to cut Britney Jean's Alien from the set list this time around, Spears did offer up a heartfelt rendition of her latest single, Perfume.

It was one of only a few moments that the pop icon found herself alone on that stage (she also performed Lucky solo), and ultimately it felt like a missed opportunity.

Where Spears could have poured her soul into the song, without dancing or pyrotechnics to distract, the sound didn't stray far from what we've heard on her album.