Seth Rogen came up with the famous 'ahh, Kelly Clarkson' line in '40-Year-Old Virgin'

• Rogen said it was his job to come up with alternative jokes for the 2005 movie.
• Director Judd Apatow told Rogen to write"dirty jokes and a list of clean jokes."
• "I was sitting on my couch writing the jokes and you came on television," he told Clarkson recently.

Seth Rogen had some explaining to do when he was a guest on "The Kelly Clarkson Show" this week.

The singer and now daytime talk show host said she can't go anywhere without someone yelling out, "Ahh, Kelly Clarkson!" - the famous line Steve Carell yells while getting his chest waxed in the 2005 comedy, "The 40-Year-Old Virgin."

"I could literally do anything in the world, doesn't matter how many hits [or] what I do in life, I could save a family from drowning, fires ... and literally the one thing people know me from is 'Ahh, Kelly Clarkson!'" she told Rogen.

Rogen, who on the show to promote his book, "Yearbook," said: "I'm terribly sorry, first of all. I owe you an apology."

The comedian, who also starred in "The 40-Year-Old Virgin," revealed that director Judd Apatow tasked him with writing alternate jokes for the movie, which led to him creating the Clarkson line.

"We don't always like to have profanities," Rogen explained. "Judd was like, 'You should write a list of jokes that are dirty jokes and a list of clean jokes.' And it was hard to write the clean jokes. I honestly think I was sitting on my couch writing the jokes and you came on television. I saw you and it was Kelly Clarkson!"

The line turned out to be one of the most memorable jokes from the movie, and one Clarkson apparently can't escape.

In fact, Carell came on the first episode of "The Kelly Clarkson Show" in 2019 and did the line:

-The Kelly Clarkson Show (@KellyClarksonTV) September 9, 2019

"The 40-Year-Old Virgin," also starring Catherine Keener, Romany Malco, and Paul Rudd, went on to earn more than $177 million at the global box office.