Rumored to be dating Billy Corgan, Jessica Simpson opens up about her relationship with the Smashing Pumpkins frontman, referring to him as a "very, very dear friend."

"I can't find good enough words to speak about Billy," she tells Ryan Seacrest on his KIIS FM radio show. Corgan worked on a song with Simpson for her new VH1 show "The Price of Beauty."

She says of her time in the studio with the rock star, "For him to give his time and talents and share them with me, it was a great experience and I hope we can do more music together."