X, however, had previously appeared on television for a 1984 performance on 'Late Night with David Letterman'.
It also appeared on Last Night!
He became an overnight sensation as a result of the win, appearing on Late Night with David Letterman that week.
He also appeared with the Muppets on Night of 100 Stars.
She appeared on Late Night With David Letterman and other television programs.
Goulart appeared again on Late Night, this time on February 7, 2008.
Felicity was soon revealed to be over 18, and schemed her way into the station to appear on Big Night Out.
In 2010, he appeared on Late Night with Jimmy Fallon.
They have also appeared numerous times on Late Night with Conan O'Brien.
Tracy eventually appears on Late Night only to immediately fall asleep after sitting down.