Billy Joel Busts Out Some Impromptu Doo-Wop On 'The Tonight Show'
One of the best moments from Billy Joel's "Tonight Show" appearance actually happened during a commercial break.By Briana Altergott | January 7, 2016
Billy Joel's appearance on "The Tonight Show" this week was pretty epic.
But one of the best moments of the night actually happened during a commercial break.
"Whoa, for the longest time. Whoa, for the longest," the "Tonight Show" cast sang.