At 7 p.m. Sunday, the Lyric Opera House plays host to a concert by R&B; stars Keith Sweat, Johnny Gill and Raheem DeVaughn. Last month, Sweat released a Christmas album, A Christmas of Love. Gill, who replaced Bobby Brown in the group New Edition, is best known for his ballads. And DeVaughn, a Beltsville native who attended Coppin State University, released his first album, The Love Experience, in 2005, and his song "Woman" was recently nominated for a best male R&B; vocal performance Grammy Award. The Lyric is at 140 W. Mount Royal Ave. Tickets are $66. Call 410-547-7328 or go to ticketmaster.com.