Importing Jingles

Thanks so much! I went to freeplay, and typed in jingles, but came up with nothing. Do I need to know the exact song I want, or is there a selection of background tracks to download, from which I can then pick a song? When I was at the Apple store, their computer had "jingles" as an entry on IMovie, and a huges selection of "shorts", "medium lengths" and "longer length" songs, w/ titles that reflected the sound of each song.

Thanks for responding. Yes, that's exactly where I am looking, and I do see the "Jingles" heading, but there is nothing in the file. Or in any of the ILife Sound Effects files. The "Standard Sound Effects" files and "Skywalker Sound Effects" files both have contents in them, thatpop up on the screen below. But nothing pops up with the Jingles or any other ILife Files. they seem to be empty. That's why I was wondering if they make you purchase them somewhere.... If not, is there a way to just download them?