"I had this vision of marrying Gavin Rossdale one time," she said. "[We dated for] eight months...and we were like, 'Let's spend our rock star money!' We had a really good time."
"The thing is that everyone gave me so much s--t because Gavin sounded a lot like Kurt...but man, he was such an Adonis in his day," she admitted.
Stern asked the Hole frontwoman outright if she was hooking up with Rossdale while he and Stefani were dating, and she answered in the affirmative and confirmed that Gwen is aware of the previous relationship.
Meanwhile, another blast from Love's past is on the rampage. Take it away, Billy Corgan.
In last month's Rolling Stone, the pumpkin smasher questioned her parenting skills and said he wants to put the kibosh on her ability to use any of the music they created together.
"It would be a real big problem [if she released it]," he said. "I haven't given my permission. I have no interest in supporting her in any way, shape or form. You can't throw enough things down the abyss with a person like that."
"My face is my face, my heart is my heart, my money is my money. Oh, and my songs are MY songs," he wrote. "If you can't write your own songs maybe you should just be happy that you fooled someone into doing your work for you."
Something tells us this won't get resolved anytime soon.
Other celeb colleagues work together really well. Check 'em out in our Kissing Costars: TV gallery!