NEW YORK (AP) _ Rozonda ``Chilli'' Thomas and Tionne ``T-Boz'' Watkins are looking to collaborate with a new voice, but the TLC stars insist they're not trying to replace the late Lisa ``Left Eye'' Lopes.

``Nothing has changed. We're not replacing Lisa,'' Thomas told The Associated Press in a recent interview. ``We're not looking for a new member.''

Last month, the pair announced they were launching a search to find a vocalist to perform with them in concert and for one track on TLC's upcoming greatest hits project _ a journey that will be the subject of a UPN reality show, ``R U The Girl with T-Boz and Chilli.''

Some fans were concerned that Thomas and Watkins were seeking to fill the shoes of Lopes, who died in a car crash in Honduras in 2002.

But the duo said then that they would never try to replace Lopes _ perhaps the most dynamic member of the trio, with her colorful personality and energetic raps. Instead, they say they're simply looking for a fan to perform with them for a one-time performance and for a song on the greatest hits project.

``We started out with our fans and it's all about our greatest hits,'' Thomas said. ``Basically, we are trying to give back to our fans and find one girl and give her a chance of a lifetime, to do one last performance with TLC.''

``We kind of call it, like, fan appreciation,'' said Watkins. ``We started together and we want to end it together, and that's something that Lisa would have been fond of.''

TLC, which debuted in 1992, ranks as one of the best-selling girl groups in pop music history. Their multiple hits include ``Unpretty,'' ``Waterfalls,'' ``Creep'' and ``No Scrubs.'' Their last full album was 2002's ``3D.''