Keith Sweat

The R&B veteran recruited T-Pain for a cut on last year’s ’Til the Morning, one in which both men wonder how many licks it takes to get to the middle. Mostly, though, Sweat works the old-school lover-man vibe that used to dominate charts back in his early-’90s heyday.

Sat., April 21, 8 p.m., 2012