After a well-publicized breakup and a very fast reconciliation, Justin Bieber and Selena Gomez have reportedly broken up yet again. And this time, it might be for good.

Us Weekly reports that multiple sources say the young couple have parted ways after getting in a huge fight while on vacation over the holidays. Justin, 18, and Selena, 20, were in Puerta Vallarta, Mexico, for a New Year's trip when it went downhill.

"They had another huge fight, and Selena won't forgive him," an insider told Us. "He's been really down about the breakup."

Justin has been acting out in 2013 -- and perhaps it's because of the split. The teenager has been caught drinking and smoking pot and hanging out with reported bad influences.

This all sounds incredibly familiar. Selena's BFF Taylor Swift reportedly got into a huge fight with her man, One Direction's Harry Styles, while they were on a New Year's vacation. Taylor cut the trip short and flew home. The pair are reportedly done for good as well.

Meanwhile, Harry has been photographed having a good time with friends and fans alike.

At least Selena doesn't have to go through this alone. The pals can eat ice cream and listen to sad songs together while their former bad boys party without them.

Left behind

After all the Chris Brown, Rihanna, Karrueche Tran drama that unfolded over the last year, KT has broken her silence about becoming the third wheel.

While many have speculated that Breezy and RiRi have gotten back together, it became overwhelmingly evident the past month (Instagram photos of the pair, getting cozy courtside at a Lakers-Knicks game, kissing in public).

"I've been on a rollercoaster for the past year," Karrueche, 23, tells Vibe magazine.

"It's a lot going on but it could be a lot worse," she said of the saga where CB publicly admitted to being in love with both women. "I'm not gonna sit and dwell and become consumed in that negativity, because I could very much be that person, especially when things are so public and so thrown in my face."

But would KT ever try to be friends with the happy couple? "For everybody, emotionally, that would just be way too much."