Lady Gaga said her career came full circle at the Z100's annual Jingle Ball concert she headlined at Madison Square Garden. Also on the bill, Pitbull, LMFAO, Kelly Clarkson, David Guetta, Foster the People and David Guetta.
Lady Gaga's career came full circle for a moment Friday night. The singer headlined Z100's annual Jingle Ball concert at Madison Square Garden, an event that holds special meaning to the New York native. "This was the first live show I ever went to -- whose first live show is this?" Gaga asked the sold-out, tween-heavy crowd. "I used to listen to Elvis Duran every day on the radio and imagine how one day he would be introducing my songs."