Well, that only took 25 years but Gavin Rossdale finally admitted to Details Magazine that he did have a relationship with Marilyn. I don't know why Gavin denied it all of these years, but he says, "I think at the outset there was a sort of fear—that was right at the beginning of Bush, and I didn't want it to be part of it. It felt like a cheap shot, so I was like, "I'm not getting involved." I've never wanted to appear closed about it. It's not something I've talked about really because it's always been in the glare of a tabloid world. It's just one of those things: Move on. When you're 17, Jesus Christ. I don't think there's anything strange about any form of—you're learning about life. It's a part of growing up. That's it. No more, no less."
Gavin also says it was a one time thing and Marilyn is the only guy he has been with. I think his reasoning for not saying anything is probably true, but at the same time, if you ignore something for 20 years people will keep speculating and I think that makes it worse than if you had just come out and admitted it right away and then its gone. People will forget and move on.
Details did not ask him whether he thought Gwen and Marilyn look very similar.