Katy Perry and Dolly Parton are to duet at the The 51st Academy of Country Music Awards next month.

Katy Perry

Katy Perry

The 'Firework' hitmaker and country music legend will join forces to perform two of Dolly's classic hits including a mashup of 1971's 'Coat of Many Colors' and 1974's 'Jolene'.

The 70-year-old singer says it was all the 30-year-old pop beauty's idea to collaborate for the show.

Dolly told Rolling Stone Country: "She got the big idea, 'Why don't we sing 'Jolene' together?' Because she loves that song and since it's going to be one of the [television] movies I go, 'Yeah, why not?'

"So I'm going to try to combine 'Coat of Many Colors' and 'Jolene.'"

On the night the '9 to 5' hitmaker will be honoured with ACM's Tex Ritter Award for her biopic of the same name of her song 'Coat of Many Colors'.

The prize has previously been given to movies such as 'Walk the Line', which featured country star Tim McGraw.

On hearing she will receive the prestigious prize, she said: "To be up there with the great stories like 'Coal Miner's Daughter' and 'O Brother' and 'Walk the Line', it's like you say, 'Wow, all those were feature films, and this one was just a movie of the week on television.'"

The Academy of Country Music Awards will be telecast live on CBS on April 3.