Joe Jonas had an interesting 25th birthday party

It happened in Vegas, but it's not staying in Vegas.

Pop star Joe Jonas turned 25 on Friday, and he did it in the most Las Vegas way possible -- on stage at a nightclub getting a lapdance from somebody known as "the world's smallest stripper."

Jonas hit Beacher's Madhouse inside the MGM Grand for his birthday bash. In addition to the lap dance by Little Spinner, a mini Miley Cyrus performed. There was a mini Jonas Brothers concert as well.

What a chill, classy way to ring in your first quarter century.

More photos below.