The 36-year-old admits to lusting after Aguilera, but he insists his marriage and the DIRRTY singer's age would prevent him from acting on his impulse if the opportunity ever arose.
Grohl says, "The most amazing rumour I heard was that I was f**king Christina Aguilera. That was a good one.
"They were saying it on this radio station, so I called them up and told them, 'F**king stop saying it, you b**tards!'
"I have met Christina Aguilera but I didn't f**k her. I wanted to but she's a little baby kid, so I couldn't do that."