This generation's preeminent R&B loverman, R. Kelly, descends into pitiful self-parody on his seventh solo album, TP.3 Reloaded. You've heard it all before, from the club drivel of ''Playa's Only'' to ''high-concept'' slow jams like ''Sex Weed.'' So what's new here? A tepid stab at reggaeton on ''Burn It Up,'' a B-squad Prince homage (''Remote Control''), and the beyond-bad telenovela ''Trapped in the Closet, Chapters 1-5.'' Unless you're intrigued by a cramp-afflicted Kelly doing the nasty, listen at your own peril.