Poor, poor Selena Gomez... We don't know whether to call this a wardrobe malfunction or a body malfunction. It's probably a combo of both that left the Rudderless star with some serious underboob sweat. Summer is no time to mess with a skintight black tank, even if you are trying to show something, or things off..
But could a quick dab have fixed this issue or is the bigger problem the lack of bra? Under wire can be a life-saver when it comes keeping body run-off where it belongs.