Dolly Parton

Dolly was in the U.K. to promote her upcoming rock album.

It was supposed to be performed alongside "What a Wonderful World" and "Rainbow Connection" from 'The Muppet Movie.'

Session took place just before actress and singer's death in 2022.

"Dark duet" version of the REO Speedwagon classic will appear on country legend's 'Rock Star' album.

Set for release later this year, 'Rock Star' will include a who's who of rock royalty.

Country legend's upcoming rock album will also feature Cher, John Fogerty and others.

Miley and Dolly came to party and duet.

See how music's finest arrived on the red carpet for the 2019 Grammy Awards.