Radio shock jock Howard Stern has never been one to mince words, but in a rare about-face, the "America's Got Talent" judge is apologizing for slamming Lena Dunham.

The Sirius XM radio host took to the airwaves Monday to apologize for calling Dunham -- who created and stars in the critically acclaimed HBO show, "Girls" -- a "little fat girl who kind of looks like Jonah Hill."

"I felt bad because I really do love the show 'Girls,' and enjoy it, and I admire the girl who writes it," Stern explained just a day after Dunham took home a Golden Globe for Best Actress in a TV Comedy. "It makes me feel bad, and I think she is getting the impression that I somehow think she's just a talentless little fat chick."

Dunham, whose show also picked up a Golden Globe for Best TV Comedy, took Stern's criticism in stride, appearing last week on the "Late Show with David Letterman" to laugh off the incident.  Dunham referenced Stern's comments, telling Letterman, "[Stern] said, 'Congrats to her; it's so hard for little fat chicks to get anything going,' and it put me in the best mood. I just want my gravestone to say, 'She was a little fat chick, and she got it going.'"