No, you cannot. Tracks from the iTunes Store are sold for your personal use only:
You shall be authorised to use iTunes Products only for personal, noncommercial use.
Nor could you use any tracks, even from a CD, for commercial purposes without a license from the record company or whoever else holds the rights to the track. I'd suggest that unless you really, really want to use a commercially-released track and are prepared to pay handsomely for the privilege, you obtain your music from one of the several companies that sell royalty-free tracks.