As if playing a white blood cell in "Osmosis Jones" weren't enough, Kid Rock will also donate a new song to the soundtrack.

Due August 7, the album will include Kid's "Cool, Daddy Cool," which features a cameo by his late sidekick, Joe C., who also acts in the movie. The Bullgod's hit-making DJ, Uncle Kracker, lends a new tune to the record as well.

St. Lunatics' "Summer in the City," which is also available on Free City, the debut album from Nelly's hometown crew, will be the first single from the soundtrack, according to an Atlantic Records spokesperson.

Southern rapper Drama will provide the album's second single, "Big Ball."

The soundtrack also features a few proven hits, including Trick Daddy's "Take It to Da House" and Craig David's two-step anthem "Fill Me In," which he co-wrote with Artful Dodger's Mark Hill.

The soundtrack also marks the debut of Solange Knowles, sister of Destiny's Child singer Beyoncé, on the optimistic track "Solo Star" (see [article id="1445052"]"Destiny's Child Dreaming Of A Bootylicious Christmas"[/article]).

Directed by Bobby and Peter Farrelly ("Dumb and Dumber"), "Osmosis Jones" takes place primarily inside the body of a man fighting a cold. The film, in theaters August 10, stars Chris Rock, Bill Murray, Laurence Fishburne, William Shatner and Molly Shannon.

The track list for the soundtrack, according to Atlantic: