Twenty-six tracks, one for each letter of the alphabet. Tried to pick mostly on the standpoint of my favourites/classic songs that corresponded to the letter. If you like your rock and alternative music you should like this list. Sidenote, L was surprisingly the hardest letter to pick for me, had about 8 songs I wanted to use.
PS if you don't like Metallica skip their cover for A (my fave song in high school) you will like the rest.