The new mum, who recently shot scenes for hit TV show Nashville, will join Alan Jackson, Martina McBride, Brad Paisley, Lady Antebellum, Little Big Town, newlywed Jason Aldean, Garth Brooks and Miranda Lambert, among others, at the 50th ACMs in Texas on 19 April (15).

Organisers have confirmed the Genie in a Bottle hitmaker will join a surprise artist for "a special duet".

Aguilera will play a superstar trying to debut a country album on Nashville. Her first episode on the country music-themed drama will air four days before her ACMs debut.

Aguilera's The Voice co-judge Blake Shelton will co-host the ceremony at AT&T Stadium in Arlington, Texas with Luke Bryan.