Currently Being ModeratedFeb 6, 2013 6:07 PM (in response to Sunnie_bravo)
If you're using iTunes match, until you update to iOS 6.1 you can't delete (or download) individual songs. All you could do is delete all the music from the phone by going to Settings>General>Usage>Music, swipping All Music and tapping Delete. You will then have to download the music you want on your phone again from iTunes Match.
Currently Being ModeratedFeb 6, 2013 6:12 PM (in response to Sunnie_bravo)
Match is off, and not needed in this case.
Sunnie, all you need to do is swipe across the song name and tap the Delete button. You can then re-download the song from the iTunes store directly from your iPhone (or back on your computer).