Must have been a long night.

Avril Lavigne partied it up at The Nice Guy in Hollywood last night, and appeared to be a bit disheveled as she left at the end of the evening. Recognize the guy she's arm-in-arm with? Well, we do! His name is J.R. Rotem, and Britney Spears had a passionate fling with him back in the day. He's a music producer, so it's very possible they know each other that way, but it's also possible he's her new dude!

It's nice to see the "Complicated" singer out and about, after crazy conspiracy theories circulated earlier this summer claiming that the songstress had died in the early 2000s and was replaced by a look-a-like actress named Melissa Vandella.

In recent years, the Canadian beauty has been battling Lyme's disease, but word on the street is that she plans on releasing a new album later in 2017.

Tell us sk8ter girl, is this hunk your new boo?