CYNDI LAUPER may be 54 but she still just wants to have fun, and she's got a new dance track, "Into the Nightlife," to prove it. Her new album, Bring Ya to the Brink, is in stores now, and she talks about going on the road with the B-52s, JOAN JETT and the BLACKHEARTS, REGINA SPEKTOR, THE CLIKS and even ROSIE O'DONNELL on her "True Colors Tour," kicking off Saturday in Boston.