The singer-and-actress - who dated the 'Gravity' singer for nine months before splitting in May 2007 - admits she still has feelings for him even after he discussed their sex life in a recent interview, in which he called her "sexual napalm".
She said: "I will always care about him. I think he's a great person, a great musician, but I was very disappointed by the article."
Although she was upset at the interview, Jessica - who was famously a virgin until she married ex-husband Nick Lachey in 2002 - admits it was a "compliment" as he was positive about her skills in the bedroom.
She said: "Normally you'd think someone you care about would keep those details to himself. It was definitely a compliment, in a way. I don't really want people to know that about me. I'm like The Good Girl, then that happened.
"He gave away my game."
Jessica also revealed she is still on good terms with another ex-partner, American footballer Tony Romo, even though he dumped her on her birthday last year.
She told US TV talk show host David Letterman: "Tony is great, still a friend of mine. I still look at his cute butt in the outfit - uniform."
"What went wrong? You'd have to ask him that. He broke up with me on my birthday. We are still good friends."
Mark Owen confesses affairs
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