PopUps :: Nick Jonas Promotes New Single at NYC Gay Club, Strips

Justin Bieber isn't the only heartthrob who can strip!

Nick Jonas, who was once part of the early '00s boy band the Jonas Brothers, promoted his new single "Jealous" Tuesday night at a New York City gay club but ending up giving his male audience a little something extra: a strip tease.

Jonas, the youngest of his brothers, performed the track during BPM gay club's gay college night before he took off his blazer and ripped open his shirt, revealing that he's no longer a teen but a grown man with abs and flexed muscles, the Daily Mail reports.

Other nearly naked dudes accompanied the 21-year-old singer on stage, who had dollar bills hanging out of their neon underwear. Jonas threw off his blazer and stood on stage with his white button up ripped open.

"Looking noticeably transformed from his awkward teen years, the singer boasted a gym-honed physique, which he proudly unveiled inside the Manhattan venue, the Daily Mail writes. "This year, Nick has trained in mixed martial arts for the role of a cage fighter in the TV series 'Kingdom' and had the body to boast for all of his hard work."

But gay fans shouldn't get too excited. The signer is currently dating Miss Universe Olivia Culpo and said his song "Jealous" is about her.

"I'm with my girl and [some other guys are] looking at her and I was like, I've just been training for three months how to be a real fighter for a TV show and I could hurt you now," he told MTV. "It was a moment when I was like, I've got to write about that because the fact that I got so passionate about it so quickly means that there is a song there."

Jonas also performed at New York Fashion Week's Fashion Rocks concert Tuesday night but, unlike the Biebs, did not go into stripper mode.

Check out the Jonas candids over at the Daily Mail.

Watch a short clip of the strip tease below: