Kevin Mazur for iHeartRadio
Robin Thicke kicked off the iHeart Radio Music Festival with a pop—literally.
The "Blurred Lines" singer suffered a wardrobe malfunction on Friday night when he hit the stage.
Robin showed more skin than he intended when a button on his shirt popped off, revealing Thicke's midriff. A photographer in the pit pointed out the mishap to Thicke, who then attempted to tuck in his shirt.