The 'Gravity' star had been quoted as telling Playboy magazine that Simpson was "sexual napalm" and "like crack cocaine" to him.
Speaking on David Letterman's show, she said: "I mean, normally you would think that somebody you care about would keep those intimate details to himself.
"I mean, it was definitely a compliment, in a way, but I don't really want people to know that about me. That's you know, I'm like the good girl and then that happens."
When Letterman joked that she could be both, the singer replied: "Yeah, but that's the thing - I am... but he gave away my game!"
She added: "I will always care about him. I think he's a great person, a great musician, but I was very disappointed by the article."
Simpson's entire interview airs tonight on CBS.
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