Vocal harmonies take center stage for Rob Thomas and Charles Kelley, who find common ground being the leads of musical groups (Matchbox 20 and Lady Antebellum, respectively), as well as solo artists. The magical episode features hits from Thomas, including "Lonely No More," "This is How a Heart Breaks," "Pieces," "Smooth," and the Matchbox 20 hit "3 AM"; as well "Lonely Girl," from Kelley's recent solo album, and the popular Lady Antebellum cuts "We Owned the Night" and "Love Don't Live Here Anymore."