Pop star Robin Thicke suffered a series of embarrassing wardrobe malfunctions while on stage at a music festival in Las Vegas on Friday (20Sep13). The Blurred Lines hitmaker was among the acts performing at the iHeartRadio Music Festival in Sin City, but he was left red-faced when he realised a button had popped off his shirt, leaving his midriff exposed. The blunder was pointed out by a photographer stationed in front of the stage, and the star attempted to tuck his shirt into his pants to cover himself up. However, he suffered another mishap later on in the show when his pants became unzipped, but he was able to laugh off the incident with presenter Ryan Seacrest after he finished singing, according to Eonline.com. Thicke's performance was introduced by Sean 'Diddy' Combs and the rapper hopped back on stage afterwards to shake the singer's hand.