We all love to see what our favorite celebrities are capable of doing, some have talents most don’t even know about. Take movie actors for example, you wouldn’t expect them to be able to sing too well, but they often have more than one talent up their sleeves. Five years ago, Sting held a concert in NY in celebration of his 60th birthday. He was performing on stage when he invited none other than Robert Downey Jr, famed for his role as Iron Man in the popular Hollywood movies. The duet are incredibly together and really make a great pair!