NEW YORK (Billboard) - Avril Lavigne will sing the "SpongeBob SquarePants" theme song on the animated film's soundtrack, according to the publicist for the project.

In addition, the Shins, Ween and Motorhead are newly confirmed to contribute tracks to the set.

"SpongeBob" will also sport original songs from The Flaming Lips ("SpongeBob & Patrick Confront the Psychic Wall of Energy") and Wilco ("Just A Kid", featuring backing vocals by frontman Jeff Tweedy's son Spencer's band, The Blisters).

The Shins have recorded an as-yet-untitled new song for the soundtrack, while Ween chips in with "Ocean Man" from its 1997 Elektra album "The Mollusk".

Never exactly known as a kid-friendly act, Motorhead nevertheless makes its presence felt with the track "You Better Swim".

The set will also feature "The Goofy Goober Song" by the Dust Brothers' Mike Simpson with the characters SpongeBob and Patrick, "Goofy Goober Rock" by producer Tom Rothrock with Jim Wise and "Bikini Bottom" by Electrocute.

SpongeBob himself gets in on the fun by singing "It's The Best Day Ever". A handful of other artists are yet to be confirmed.