Mya Busts Some Tour Moves

Inside a North Hollywood rehearsal studio, Mya (front) and five dancers she's about to take on tour are running through their paces. ''My love is like...wo!'' Mya mimes, gyrating wildly to her new single. ''My touch is like...wo!... My ass is like...wo!'' And with that, she and the two female dancers snap their well-toned bums toward the male hoofers, who feign whiplash. When they bring this choreography to the stage (in upcoming TV appearances and possibly opening for Mariah and R. Kelly on tour), Mya won't even participate in most of it, because she doesn't want to cheat with tapes on the singing front, a la some other dancing divas. But she's still learning every step, and ''the stuff that I think is most effective, I'll jump into.'' Dance rehearsals have been going on so far for a week and a half, six hours a day, following every-other-morning physical therapy. Her discipline is like...wo!