BritneySpears_VegasMen_122813.jpgDavid Becker

It's Britney, bi**h!

Britney Spears put the sin back in Sin City during the debut of her two-year Las Vegas residency on Friday. The premiere performance drew a sold-out, star-studded crowd that included Miley Cyrus, Katy Perry, Selena Gomez, Kellen Lutz, and Adam Lambert.

Brit-Brit kicked of her new show, Britney: Piece of Me, at Planet Hollywood Resort & Casino by performing the classics (Baby One More Time, Oops I Did It Again, Toxic, Womanizer, Slave 4 U, etc.) before singing new tracks from her latest album, Britney Jean.

The pop star frantically traded one racy getup for the next (costume designer Marco Marco has truly outdone himself) during the frenetic, 90-minute concert. She even performed a bondage routine, complete with spanking audience member Mario Lopez with a studded harness. The Cirque du Soleil-esque routine also included acrobatics and airborne wire acts.

Britney will take the stage again on Tuesday for a special New Year's Eve performance. If yesterday's act is any indication of the future 100 ones to come, Britney's got herself a hit.