Born from Mark Lowry's 'Check In' videos, Sit Up Straight and Sing! features a selection of simple but powerful songs and hymns, with fellow Gaither family mainstay Kevin Williams on acoustic guitar. This two-CD set features one disc of Kevin performing the songs instrumentally, with the other disc adding Mark's rich baritone vocals. Songs include 'Old Rugged Cross,' 'Unclouded Day,' 'I Surrender All,' and many more.