Wynonna will guest-star as herself on an upcoming episode of the Lifetime series, 'Army Wives.' According to Access Hollywood, Wy will appear on the May 16 episode, performing two songs as part of a USO-style concert for the troops at Ft. Marshall in Charleston, S.C. John Ondrasik of Five for Fighting will also perform.

'Army Wives' begins its fourth season on April 11. The show airs Sundays at 10:00 PM (ET) on Lifetime.

Wynonna was in Las Vegas last week, joining the stars who walked the red carpet -- make that blue carpet -- at the MGM City Center's Aria, for the premiere of the Cirque du Soleil extravaganza, 'Viva Elvis,' celebrating the life and legacy of the King and his music.

Wynonna on AOL Music