Our lips are sealed, but Belinda Carlisle's aren't. She's happy to talk about posing nude for Playboy. The lead singer of the Go-Go's did a photo shoot in December last, which will appear in the magazine's August issue.

''It's sort of an homage to the sort of Vargas style, '50s pinup,''' Carlisle said on Wednesday on ABC's Good Morning America, where she performed with the four other members of the pioneering '80s girl group, whose hits include Our Lips Are Sealed.

''You don't have to be age 20 and size zero to be ... sexually viable or viable as a woman,'' said Carlisle, 42. ''And that's part of the point that I would like or we all like to prove, anyway.''

The Go-Go's released their first album of all new material in 17 years, God Bless the Go-Go's, on Tuesday. They've all had solo careers and gotten together off and on to tour and record since 1990.