Howard Stern LettermanHoward Stern has made a career out of saying whatever he wants and making no apologies. Last night, his conscience got the better of him when it came to David Letterman. TV Squad writes that on the 'Late Show,' Stern made a genuine apology to Letterman for something that happened many years ago.

Early in both of their entertainment careers, Letterman used to call Stern at home. Stern would then talk about those conversations on his radio show, which upset Letterman at the time and led to the phone calls stopping.

"I really want to apologize to you for doing that," Stern said sincerely. "And if you should call me again, I would not reveal what you said." See it here: