Michael Pollack, right, getting a handshake and blessing from Billy Joel. Pollack asked Joel if he could come on state to accompany the pop star on "New York State of Mind." Joel said yes and the video has gone viral. YouTube.com hide caption itoggle caption YouTube.com The Two-Way VIDEO: Fan Accompanies Billy Joel; 'Greatest Moment Of My Life,' He Says March 13, 2013 A bold question to the pop star — "could I play with you?" — got an "OK" response. The video of student Michael Pollack knocking it out of the park on the piano as Joel sings is going viral. "Guy's got chops!" Joel declared.