Since Joe Wong made his debut on Letterman in April of last year, he's been racking up TV appearances. Ellen DeGeneres is a huge fan, and has tapped him to be on her daytime show and her variety show. His next Letterman appearance is scheduled for February 19 (but keep checking listings, the comedians often get bumped when the show goes long). You can see him in person tonight and tomorrow at Mottley's Comedy Club.
Here's Wong on the red carpet at the American Music Awards for Ellen: