A-listers like Miley Cyrus, Katy Perry and Selena Gomez watched Spears, 32, wow the crowd by performing 23 of her chart-topping songs in seven different eye-popping costume changes and lots of pyrotechnics and spectacular special effects.
[photo: Splash News]
Perry tweeted before the show, "Soy excited to see @britneyspears baby bottle pop it off tonight at her grand opening @phvegas! We are coming in full lewks to support!"
[photo: Splash News]
“Extra’s” own Mario Lopez also got into the act, appearing on stage with Britney on all fours and getting a little bondage treatment!
[photo: Splash News]
Spears' 90-minute "Piece of Me" show next plays on Dec. 28, followed by shows on Dec. 30 and Dec. 31. It then takes a break until Jan. 29.
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