Letterman Gives JT the Third Degree

9/12/2006 1:08 PM PDT

Letterman Gives JT the Third Degree

When a musical guest of a certain stature performs on "The Late Show with David Letterman," they join Dave on the couch for a few light-hearted questions and casually mention their new album. For Justin Timberlake last night, the questions he got were about his girlfriend (Cameron Diaz), smoking weed, and, of course, the "the Super Bowl thing with Janet Jackson."

Letterman first asked Timberlake to talk about his relationship with Cameron Diaz. "I don't want to go into detail about her," Justin said. To which Dave shot back, "Well that's what we want is the details."

After laughing off a few more Diaz questions, Dave brought up Justin's Rolling Stone cover story -- and whether or not he smoked pot with the interviewer. "I make a promise to you, I try not to do drugs while I'm doing interviews," JT said jokingly. "I'm completely drunk right now, but I try to at least stay away from [drugs]."

Then Letterman turned to Justin's infamous performance with Janet Jackson at halftime of Super Bowl XXXVIII. Justin laughed as soon as David started to ask the question, and Paul Shaffer shouted out to Justin, "Isn't it great you got to sit on the couch?" To which Justin came back with, "I know, right? My first time on the damn show!"

But Justin laughed off this question too and finally answered, "I think it's fair to say that was not a well thought-out performance."