Justin and Selena’s split sounds nastier than we thought — with a new report revealing the cruel send-off the Biebs gave Selena! Read on to find out what he allegedly told her!

With Justin Bieber and Selena Gomez‘s relationship having been in a constant state of flux heading into their NYE trip to Mexico, it didn’t come as too much of a surprise that, while there, the couple got into a new fight that broke them up yet again. What is surprising, however, is a new report detailing just how nasty and cruel Justin, 18, was to Selena, 20, during the argument!

According to Cindy Adams, Selena went to a party in Puerto Vallarta, where the two were vacationing, after the fight. While there, she apparently told partygoers that, during the argument, Justin said nasty things to her, like, “Don’t let the door hit you on the way out.” Whoa!

Selena Gomez & Justin Bieber’s Holiday Vacation Gone Wrong

As previously reported, Selena and Justin were in the Mexican resort town to celebrate the holiday, but things went sour just a day before! “The two of them flew to Mexico for New Year’s Eve, but had a blow-out argument on December 30 and broke up. Selena left Mexico that same day and Justin left for L.A. on the 31st. They haven’t seen each other since and she was never at the Four Seasons [with Justin] on New Year’s Day.”

As Cindy reports, Justin and Selena were staying at El Rancho, a rented mansion in a gated community of Puerto Vallarta. Once the two had their argument on the Dec. 30, they each hightailed it to separate resort hotels, with Justin checking into the Four Seasons and Selena picking the Ritz-Carlton. Selena didn’t stay at her hotel for very long, though. According to Cindy, she left at the insistence of her mother, Mandy Cornett. “Don’t stay there. You’re alone. You have no security. Come home,” her mother reportedly pleaded.

Selena’s Breakup Revenge Plan

Since their recent break-up, Selena has been telling friends that she’s ready to move on. As previously reported, a source told HollywoodLife.com exclusively, “Justin is calling her 100 times a day and she’s not picking up. [Selena] said she wants to hookup with another guy to make [Justin] jealous, and she should.”

Only time will tell whether this split is for good or just like the handful of ones before it. Whatever happens, we wish them both well.

Are you surprised by Justin’s nasty breakup diss, HollywoodLifers?

WATCH: Justin Bieber Caught Smoking Weed?!

– Billy Nilles

More On Justin Bieber & Selena Gomez’s Relationship Drama:

1. Selena Gomez & Justin Bieber’s Break-Up: Is She Ready To Date Other Guys?
2. Watch Out Justin Bieber: Selena Gomez Is Warning You With New Video
3. Selena Gomez Dumps Justin Bieber After He Befriends Nick Jonas