U.S. Presidential hopefuls Barack Obama and John McCain have recorded yet another round of controversial campaign adverts - for an upcoming comedy competition.

The U.S. Senators will go head-to-head when they appear on an episode of hit TV show Last Comic Standing.

The two candidates filmed separate spots for the show, making fun of themselves in mock campaign ads for the series finale.

In one skit, Obama says: "Remember to vote for me in November, and if you don't think I'm funny, you've obviously never seen me bowl," adding: "I'm not going to deliver that line any better."

In his own spot, McCain insists Presidents must be funny: "I may not be the last comic standing, but I'm definitely the funniest candidate," before an off-camera voice snaps back, "Yeah, funny-looking."

[imdb]