Don't count on Benny Blanco producing Sombr's music anytime soon... Because things just got WEIRD between them. During a concert on Monday night, the Back to Friends singer flipped the script on a fan-favorite segment of his called "Call Your Ex." In it, he encourages fans to call their exes... But this time, he told fans: "I'm going to be calling my ex instead of you guys calling your ex" He whips out his phone and implores the audience to quiet down, but doesn't ever actually name the "ex" in question he's calling.