It’s every songwriter’s dream to get a tune into a McDonald’s ad, and Ronald McDonald is all about granting wishes. The fast food behemoth and MySpace are presenting the “Big Mac Chant Off,” which will welcome songs from amateur tunesmiths competing for placement in a Big Mac commercial. The catch, however, is that you need to incorporate the lyric/slogan “Two all beef patties special sauce lettuce cheese pickles onions on a sesame seed bun.” Singer Christina Milian has already submitted a track, as have other MySpace artists. You can even add Milian’s Big Mac Chant to your own MySpace profile, letting all your friends knowing “I want my Mickey D’s” to the tune of Toni Basil’s “Mickey.” To get involved, head over to the Big Mac Chant Off page and download the audio kit. Submissions close July 6th, at which point semi-finalists will be selected by McDonald’s judges (we hope this involves the Grimace), with the winner being picked by online voting. The winning song will then be featured in a McDonald’s commercial to be aired incessantly toward the end of July.