Sat, Sep 21, 2013 7:44 AM EDT 0:35
Robin Thicke showed some skin during his performance of Blurred Lines near the beginning of the iHeartRadio Music Festival ? perhaps more than he intended. As Thicke performed, a button on his shirt either came unbuttoned or popped off entirely, revealing the singer's belly. Thicke laughed off the incident with presenter Ryan Seacrest afterward, but his wardrobe malfunction was an awkward start to a night that was full of more musical surprises. Queen, Katy Perry, Chris Brown and Elton John also performed.