Mr. and Mrs. Gill, who have sold a few gazillion records between them, have spent the past five years turning the celebration of Christmas into their own little cottage industry. Their family-oriented holiday show -- Gill and Grant have been married 11 years and have a daughter, so they know about family -- includes all sorts of Christmas songs. They'll also be performing tunes from their solo careers, which means you'll doubtless get to hear Gill's "I Still Believe In You" and Grant's "Baby, Baby." Vince Gill and Amy Grant perform Dec. 7 at the Patricia and Arthur Modell Performing Arts Center at the Lyric, 110 W. Mount Royal Ave. The concert starts at 7:30 p.m. Tickets, available through Ticketmaster at 800-551-7328 or ticketmaster.com, run $56.50-$86.50. Information: 410-685-5086 or lyricoperahouse.com.