Ricky Gervais is one of the comedians that will be appearing on the forthcoming Simpsons compilation album.
Almost 40 songs have been remastered from the past nine seasons of the cult cartoon series.
Former 'Frasier' star Kelsey Grammer and pop parodist 'Weird' Al Yankovic will also be appearing alongside singer-songwriters Jackson Browne and Shawn Colvin, former Talking Heads frontman David Byrne, the B-52's and the Baha Men.
Some of the highlights include 'Lady', performed by Gervais and Grammer, as the voice of Krusty The Klown, singing 'The Very Reason That I Live'.
The release of 'The Simpsons: Testify' will coincide with the season 19 premiere of 'The Simpsons' on Fox.
'The Simpsons Movie' opens on 27 July.
