Singles seem superfluous as they usually include only radio edits of songs from the album, but not with Oasis. Here you have classic songs that are essential to anyone's Oasis collection.
Don't Look Back in Anger - Top tune of Whats the Story (Morning Glory), you probably already have this one so lets move on.
Step Out - This song got dropped from the album at the last moment, but is definitely one of the greatest pop tunes ever. Sung by Noel and full of energy. A must have.
Underneath the Sky - This is a good song, but available on The Masterplan. It has a cool feel to it, definitely worth a listen.
Cum On Feel the Noize - A cover of a cover, but it still rocks. Usually considered the best Oasis cover (and they've done a few). I like it better than the Quiet Riot version.
Overall, you gotta have this one.