Last we heard from Tiffany, the '80s four-hit-teen sensation was caught essentially outing her one-time boyfriend Jonathan Knight, the sensitive New Kid On The Block. She did that in an interview a year ago while promoting a SyFy Channel movie that co-starred her late-'80s teen pop rival Debbie Gibson. As you might have guessed, Tiffany's managed to make a modicum of early fame last by continuing to mine her past. And now, the singer, no stranger to gay pride festivals around the country, will perform at Cobalt on Tuesday, April 10. Why yes, it is a stop during the gay club's revived, retro-themed Flashback party -- go figure. And go early: I really don't think she'll be alone then, not even for a second. Tuesday, April 10. Doors at 9 p.m. Cobalt, 1639 R St. NW. No cover. Call 202-232-4416 or visit cobaltdc.com.Check out our latest music blog, Soundwaves.