Center of Harmony, 253 Mercer St., Harmony, hosts Jeff Campbell joined by Megan Slankard and Brian Lisik for a concert at 8 p.m. Dec. 20, following Campbell's scheduled performance tonight on the Jimmy Kimmel Live show. Tickets are $10 in advance and $15 at the door. Call 724-400-6044.

Pittsburgh Camerata presents “It Was All Shining: A Camerata Christmas” Friday at Mount Lebanon United Methodist Church, 3319 W. Liberty Ave.; and Saturday at Sixth Presbyterian Church, 1688 Murray Ave. Each concert begins at 8 p.m. Tickets are $15 in advance or $20 at the door; full-time students pay $5. Call 412-421-5884.

Kean Theatre, 5847 Meridian Road, Gibsonia, hosts Rob, Scott and Greg of The Clarks at 8 p.m. Friday and Saturday. Tickets start at $22. Call 724-444-5326.Union School District junior and senior high school bands will perform at 7 p.m. today at the high school, 354 Baker St., Rimersburg. Nonperishable food items will be collected at the door for donation to area food banks.