Billy Corgan Explains Relationship With Jessica Simpson

Smashing Pumpkins frontman doesn't say whether he's dating Simpson, but they collaborated on TV-show theme song.

Recently, tabloids and gossip blogs have been speculating on whether Smashing Pumpkins frontman Billy Corgan and pop star Jessica Simpson are an item. The two were spotted leaving

a hotel together in December, and last month Simpson

tweeted a photo of the pair working together in the studio.

On Thursday, Corgan opened up to

href="" target="_blank">The Chicago Tribune about the reason behind the pairing: Simpson apparently wanted the alt-rock titan to help her write the theme song for "The Price of Beauty," her forthcoming VH1 show about cultural ideas of attractiveness.

"She asked me to help her out on the theme song for her new TV show," Corgan said. "[The show] has an interesting concept. She goes around the world to show how different people perceive beauty. In some cultures, bigger is better. In some, smaller is better. It's interesting."

Simpson has dabbled in both the pop and country worlds musically, but it seems that Corgan has been helping her explore her inner rock god. "I ended up writing part of [the theme song]," he told the paper. "It has a little bit of an alternative-rock edge, but it's still very poppy."

While Corgan was clear about his musical collaborations with Simpson, he was vague about his possible romantic involvement with the pop singer. But he was forthcoming on what it was like to be a focus point of tabloid culture: "The stuff that I've seen doesn't have any bearing to the reality that I'm in," he said. "It's like being in a cartoon. It has nothing to do with what's really going on or how I feel."

Corgan is currently working on the Pumpkins' Teargarden by Kaleidyscope, a planned 44-track collection he's gradually releasing over the course of three years via free download from his Web site.