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Britney Brings Colton Haynes On Stage To Get Whipped: "Beautiful! His Ass!"

The harness is such a good look for him.

Colton Haynes joined Britney Spears on stage last night at her "Piece of Me" show in Las Vegas.

The 28-year-old actor was plucked from the audience and put in a leather harness to play the coveted role of "Britney's bitch" during her "Freakshow" performance, and he spent the majority of it showing off his famed booty roll.

In a video Colton posted on Instagram, the pop icon gives him an air kiss and then turns away to fan herself.

"Give it up for Colton!" she proclaims when the song finishes. "You're an amazing dancer, oh my goodness!"

As Colton turns to exit the stage, Britney catches a glimpse of his great ass (his words!) and adds: "Everyone's so beautiful! His ass!"

After the performance, Colton tweeted his shock at what just happened. "I don't even know what just happened," he wrote. "I got brought up on stage to perform with @britneyspears & I hope I get a residency now!!! Lol."

Another major event at "Piece of Me" last night was Britney's inaugural performance of her new song "Do You Wanna Come Over?," which officially dropped at midnight.

"Do You Wanna Come Over?" is the fourth song to be released from Britney's upcoming album, Glory, out August 26.

Two days later, Britney is scheduled to bless the MTV Video Music Awards with another likely iconic performance to add to her list.

Check out a clip of the performance (and more Colton!) below:

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