Andy Cohen lived out a Backstreet Boys fan’s dream on Sunday night as he was serenaded by the group during their Las Vegas show.

The group took the stage at the Zappos Theater at Planet Hollywood for the latest of their residency gigs, and were joined by the talk-show host for their hit “Shape of My Heart”.

BSB — Nick Carter, Kevin Richardson, AJ McLean, Brian Littrell, and Howie Dorough — could be seen dancing around Cohen, who showed off his moves before receiving a personal performance and a red rose.

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I’m totally a Backstreet Boy now! #ShapeOfMyHeart

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The routine drove Cohen and the crowd wild, with the “Watch What Happens Live” star posting a clip of the moment on Instagram, as well as announcing his new sixth-member status with a cute snap.

The “Larger Than Life” hitmakers, who have been together for a whopping 25 years, also posted the video on Twitter, joking that “whatever happens in Vegas, stays in Vegas.”

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Cohen’s appearance comes after his fellow talk-show host James Corden took the stage with BSB in July.

The British star ended up crashing a meet-and-greet for a “Late Late Show” skit, taking selfies instead of pics for fans, and ruining concert-goers’ photos by standing in front of their shots.