“Mountain Stage” begins a four-consecutive-Sundays run of shows at the Culture Center Theater in Charleston this weekend. Sunday’s show with guest host Kathy Mattea features Grammy winner Shawn Colvin, songwriter Lucy Kaplansky, Bruce Robison and Kelly Willis, Rebecca Loebe and Kacy & Clayton. Doors open at 6:30 p.m. The show begins at 7 p.m. Advance tickets are $30. Day of the show is $35. For more information, visit mountainstage.org.