Zach Galifianakis recently dropped a little fun fact in that he stole a pair of Justin Bieber‘s underwear after they filmed a 2013 episode of “Between Two Ferns.”

Zach ended up getting slimed at the very end of the clip. So during a recent appearance on David Letterman‘s new Netflix show, Zach explained what happened.

“I had to change clothes … I got into his trailer to get this [slime] off of me. I didn’t have any underwear so I see a pair of underwear in the corner. I needed a pair of underwear … I put ’em on,” Zach explained. “Then I started thinking about it. [On] a lot of levels it’s wrong.”

“I took the underwear,” he confessed. “Years pass, and I had taken the underwear with me … because I have nieces.”

“So, we walk up to my bedroom, my sister and my niece, and we go up, and I’m like, ‘Hey, I’ve been saving these for you.’ And the look on my niece’s face … She did not accept it. I tried — she was not into it at all.”

 

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