Gomez's photo features Zedd in the background. "Missing LA and this punk," she wrote. Zedd's pic, which appears to be taken during a facetime session, shows Gomez curled up comfortably in bed. He added a fond, "Oh hi derrling."
Zedd has a successful track record when it comes to assisting on pop hits -- most recently, he helped Ariana Grande on "Break Free," one of the strongest tracks from her My Everything album. Not that Gomez needs help: her most recent single, "The Heart Wants What It Wants," peaked at No. 6 on the Hot 100. Gomez's last album, Stars Dance, came out in 2013.