Superstar Britney Spears premiered her “Piece of Me” show on Friday at the Planet Hollywood Resort & Casino in Las Vegas… with a little help from her celebrity friends!

Miley Cyrus, Katy Perry and Others Help Britney Spears Kick Off Her Las Vegas Show
Splash News

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.