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Watch Britney Spears Pull Colton Haynes Onstage in Vegas

Kevin Winter/Getty Images via ABC
Britney Spears performs onstage during the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas.

On Wednesday, Arrow and former Teen Wolf star Colton Haynes was the latest Britney Spears' latest celebrity to pull onstage during her Pieces of Me Las Vegas residency show for her sexy "Freakshow" performance, only she didn't realize it. 

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Spears routinely pulls someone from the audience to get freaky for "Freakshow" -- such as Tyson Beckford, Nicole Richie and Mario Lopez, among others, before -- but unknowingly recruited Haynes for the gig, strapping him into a leather harness for Spear's burlesque-style dance routine. 

Afterwards, Spears complimented her partner, saying, "That was so much fun, oh my God! Thank you for coming up here and dancing with us. What's your name? Colton? Give it up for Colton everyone! You're an amazing dancer, oh my goodness."

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And while he might have not been recognized for his TV roles, his butt got some attention from the pop superstar. "Wow, call me anytime," she went on. "Everyone's so beautiful -- and his ass!"

Understandably, Haynes was pretty excited afterwards.