Kem claims he didn't hear seminal jazz vocalist Al Jarreau until after he had developed his own singing voice. That's possible, but highly unlikely. Somewhere along the way, from homelessness to successful Motown recording artist, Kem created a vocal style very similar to Jarreau's, and it hasn't hurt him one bit. Even though he hasn't released a new record since 2005, he enjoys a devoted fan base that digs his relaxed, familiar R&B/jazz style. Even Al -- the voice behind hits such as "We're in This Love Together" and "Boogie Down" says he wants to do an album with him, making flattery the sincerest response to imitation. Kem performs at the Landmark Theater with comedian Marvin Dixon and Eric Nettle and the Katz Band Thursday, Feb. 14, at 8 p.m. Tickets are $48.50. 262-8100 or www.ticketmaster.com.