Country Music superstars Lady Antebellum will perform on the finale of ABC's "Dancing With The Stars" Tuesday night. Awesome. The trio will debut "Dancing Away With My Heart" from the cd  "We Own The Night"before the mirror ball trophy will be given out to the winner. The shows' remaining contestants are Rob Kardashian and partner Cheryl Burke, Ricki Lake and partner Derek Hough, and J.R. Martinez and partner Karina Smirnoff. Lady A won  "Favorite Band, Duo or Group" at the American Music Awards, and will appear on "Jimmy Kimmel Live!" tonight. Whew!