Ed Sheeran reunited his high school band and flew over the lead singer of Wheatus to perform "Teenage Dirtbag" at his Hamburg, Germany concert.

Sheeran "ask[ing] them to come rock it with me at a stadium." He "cheekily" invited Brown "to come over and rock it with" them, too, and he was clearly more than game, "being the [legend] that he is." ...