Country couple Blake Shelton and Miranda Lambert have been added to Sunday's official Super Bowl program.
 
The pair will sing "America the Beautiful" as part of the pre-game festivities at Lucas Oil Stadium in Indianapolis.
 
Lenny Kravitz will also perform before the big match between the New England Patriots and New York Giants, and Kelly Clarkson will belt out the National Anthem.
 
Madonna will perform at half-time and is expected to share the stage with Nicki Minaj, M.I.A., LMFAO and Cee Lo Green.