The singer will appear as Harris' sidekick when the next episode of his zany Best Time Ever show airs in the U.S. on Tuesday (20Oct15).

The primetime TV series, in which Harris pranks members of his studio audience, hands out prizes and appears in a series of comedy skits, has already featured a string of celebrity announcers, beginning with Legally Blonde star Witherspoon and including Alec Baldwin, Shaquille O'Neal and Jack Black.

The show will be one of MCEntire's first TV appearances since announcing her separation from husband Narvel Blackstock in August (15).