Justin Bieber partied at The Arc nightclub in Paris on Thursday night, and when it was time to head home, the 20-year-old pop star took this colorfully-dressed brunette lady with him!

Bieber hopped into his chauffeured car first while his mystery chick smoked a cigarette and made faces at photographers, and she eventually got in with him and the two headed back to his hotel.

First he stepped out with Kendall Jenner and now he's back to hooking up with randoms? Poor Selena Gomez! We thought everything was going well with Jelena after their romantic Caribbean vacation last week!

But apparently the hot/cold couple have split yet again, as Selena flew home from France alone on Wednesday, unfollowed the Biebs on Instagram and posted a very cryptic tweet. "Sometimes we think we aren't good enough," she wrote. "But then I realize when I think I'm alone I have God."

So ... How long before Biebs is back with SG again? You know it's never over!