LL Cool J and Chris O'Donnell to co-host ACM special

LL Cool J is adding more hosting duties to his resume.

The rapper, actor and Grammy Awards host will co-host the Academy of Country Music's annual television special with "NCIS: Los Angeles" co-star Chris O'Donnell.

"ACM Presents: An All-Star Salute to the Troops" will be taped April 7 at the MGM Grand in Las Vegas -- the day after the ACM Awards are held -- and will air May 20 on CBS, the home network of the "NCIS" franchise.

Luke Bryan, Tim McGraw and Keith Urban have been added to a lineup that already includes George Strait, Merle Haggard, Carrie Underwood and Lady Antebellum.

The special carries a different theme each year. This time it will be focused on members of the military and their stories.

As for the ACM Awards, Miranda Lambert and Tim McGraw are the top nominees with seven bids each. Keith Urban is up for six awards, and Taylor Swift, Blake Shelton, Kacey Musgraves and Lee Brice are next with five apiece. Florida Georgia Line and Lady Antebellum have four nods