Stevens was enjoying the show in the crowd before Joel surprised the singer. "My first time at the Garden and I wasn't expecting to be asked up onstage," Stevens later posted on Facebook. ".. talk about intense."

The August 7th show is part of Joel's ongoing residency at the famed venue, where he plays one show each month. Stevens began his lengthy music career as a pop star in New Zealand during the 1970s before moving to Australia to front the Sydney band Noiseworks in the 1980s.