Simpsons mania is in the air, and I'm not talking about Jessica and Ashlee. No, as the long-awaited Simpsons movie prepares to finally hit big screens, scads and scads of tie-ins are inevitable. This one though, unlike 7-11s turning into Kwik-E-Marts and Burger King using Homer to shill for Whoppers, isn't officially tied to the movie. The Simpsons: Testify is instead more connected to the TV series, as it bundles a bunch of original songs that have been featured in episodes over the years. Artists contributing to the compilation include David Byrne, Ricky Gervais, Los Lobos, "Weird" Al Yankovic, Jackson Browne, the B-52s, and Shawn Colvin. The Shout! Factory album's September 18 release date coincides with the premiere of The Simpsons' astounding nineteenth season on Fox.
Continue on after the jump for Testify's tracklist.
Dozens of 'Simpsons' Songs Bundled For 'Testify' (Billboard)

"The Simpsons Main Title Theme"
"Testify"
"The Very Reason That I Live" (featuring Kelsey Grammer)
"He's the Man" (featuring Shawn Colvin)
"Stretch Dude and Clobber Girl"
"The Simpsons End Credits Theme" (performed By Los Lobos)
"Ode to Branson"
"Sold Separately"
"Island of Sirens"
"They'll Never Stop the Simpsons"
"You're a Bunch of Stuff"
"What Do I Think of the Pie?"
"Baby Stink Breath"
"Tastes Like Liberty"
"Jellyfish"
"Homer & Marge" (featuring "Weird" Al Yankovic)
"Everybody Hates Ned Flanders" (medley) (featuring David Byrne)
"I Love To Walk"
"Marjorie" (featuring Jackson Browne)
"The President Wore Pearls" medley
"Glove Slap" (featuring the B-52's)
"O Pruny Night"
"America (I Love This Country)"
"America Rules"
"Welcome to Moe's"
"We Are the Jockeys"
"Song of Shelbyville"
"A Star Is Torn" medley
"Who Wants A Haircut?" (featuring Baha Men)
"My Fair Laddy" medley
"Springfield Blows"
"King of Cats" (Itchy & Scratchy medley)
"Lady" (featuring Ricky Gervais)
"You Make Me Laugh"
"Lady Riff" (featuring Ricky Gervais)
"Poppa, Can You Hear Me?"
"Yokel Chords" medley
Previously unaired bonus tracks:
"Hullaba Lula (featuring Kelsey Grammer)
"Song of the Wild Beasts"
"Dancing Workers' Song"
"Oldies and Nudies"