Singer D'Angelo made a surprise appearance at the Bonnaroo Music & Art Festival early Sunday morning. It was his first live U.S. appearance in 12 years. He made the appearance, shocking a few thousand fans during Ahmir "Questlove" singing session. He stayed on the stage for 90 minutes singing songs like Jimi Hendrix' "Have You Ever Been to Electric Lady" and Led Zepplin's "What Is and What Should Never Be." D is said to have been very reserved at the beginning, but he eventually opened up and the crowd loved it. He was asked to do an interview, but D said "not yet". He recently did an interview with GQ magazine. This was only a prelude of what's to come.