Conan: I'm Not Going to Grow Up

O'Brien chokes up as he says goodbye to 'Late Night' and promises that despite an earlier time slot, he won't grow up. Clip above, go to NBC.com for more.

Updated Apr. 25, 2017 4:08PM ET / Published Feb. 21, 2009 5:14AM ET

O'Brien chokes up as he says goodbye to 'Late Night' and promises that despite an earlier time slot, he won't grow up. Clip above, go to NBC.com for more.