"They started flirting online and it quickly became physical," said a source.

The two have apparently been hanging out a lot together as well as they recently went on a getaway to Puerto Vallarta, Mexico and along with a group of friends.

"One of the reasons she's hanging out with Haze is to make [her ex, Justin Bieber] jealous," said the source, adding that Bieber has been wanting to work with the producer for a long time.

Zedd and Gomez have apparently parted ways and have mutually decided to just be friends.

"Zedd and Selena have decided to be friends. Zedd is all about getting his album ready and being out of the magazines and Selena is all about her movies, Mexico and music," said a source to Hollywood Life. "They have just drifted apart romantically but have remained really good friends."

"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," added the source.

Previous rumors of the two breaking up started to make rounds after the DJ was apparently fed up with the singer's "games" with Bieber and wanted her to completely cut Bieber out of her life, otherwise he would be done with her.

"The liking of the Instagram is just a shot at Zedd because he is all about his album and work and not focusing all of his attention on her. Zedd has realized he really hates these childish games she is playing and is really getting over her," said a source to Hollywood Life. "Zedd doesn't want to be a tabloid guy, he wants to be an artist and the games Selena plays puts her in the news all the time. He has given her an ultimatum, lose Justin or lose him."

This article was originally published on Fashion & Style.