It was a dream come true for a young, blind piano player named Logan Riman. He's a huge Billy Joel fan...in fact when he performs he goes by the name "Logan the Piano Man." He played at Radio City Music Hall for a talent show back in April, and the crowd love him! Well this week, Logan got to play with the "Piano Man" himself, Billy Joel! Logan hung out at Madison Square Garden for Billy's soundcheck before his show, and Billy called Logan up on stage to play piano. So Logan started playing "Piano Man," and Billy joined in!