Look Out Irina! Lady Gaga And Bradley Cooper CAUGHT Sucking Face In Palm Springs

Irina Shayk, Bradley Cooper's girlfriend and baby mama, better watch her back! Lady Gaga was caught making out with Cooper on the set of their upcoming film A Star Is Born!

Cooper and Gaga were all over each other as they shot a few scenes in the middle of the desert while Gaga headlines Coachella.

Now that fatherhood has made Cooper even hotter, we don't blame Gaga for wanting to make out with her leading man.

Cooper's close relationship with his co-star has already started to cause late-night fights between him and Shayk. She "can’t help being jealous," a source told Life & Style. "She’s been calling him a lot and interrupting their rehearsals. There are days when Bradley’s holed up in Gaga’s house in Malibu and he’s not able to call her back right away, and Irina flips out.”

Cooper and Gaga have been caught together off set, as well, when they were spotted on a dinner date last year. So maybe Shayk has some reasons to be nervous...