Eat your heart out, Bieber!

Selena Gomez caused a photographer frenzy at LAX on Sunday when she arrived back from an extended vacation in Mexico, and the singer made no effort to hide her new curves in a slinky grey dress. The brunette beauty received a lot of criticism over her fuller figure after pictures surfaced of her in a bikini last week, but the "Heart Wants What It Wants" songstress took to Instagram to slam her haters and declare she was proud of her new voluptuous physique.

So what was Miss Gomez doing south of the border? Recording some new tunes at Joe Francis' mansion! She's not making beautiful music with boyfriend DJ Zedd anymore, though, because they've reportedly broken up!

"Zedd is all about getting his album ready and being out of the magazines and Selena is all about her movies, Mexico and music. They have just drifted apart romantically but have remained really good friends,” our source spilled to the outlet. “When they were working on promotion for their song everything seemed to be going great but then they went back to their normal lives and figured that they weren’t missing each other," a source dished to Hollywood Life.

In other news, the Spring Breakers star is the latest celeb to strip down for Mario Testino's Towel Series, and it appears the images were taken a while ago, because she looks quite skinny in the shot.

Bieber's former lady love is turning into quite the bombshell!