thesession.org
All the Irish tunes are on that site.
on youtube knightw11 has wwe sheet music he is really good!
If the music is in the public domain, you can find it legally on the internet. Otherwise you have to buy the sheet music. Artists deserve payment. Sometimes public libraries will buy sheet music so you can check if yours does.
Music stores have it, or online. Lyrics.com is a good one.
tactic
One may find blank sheet music at any reputable music equipment vendor. A good vendor is "Music Paper". One may also download and print blank sheets from "Blank Sheet Music".
i play flute and piano and I've noticed that the notes are the same on the g/treble clef. except for the chords. hears the best thing i could get: http://www.scribd.com/doc/362101/The-SimpsonS-Theme-Piano-Partitura-Sheet-Music-Noten-Partition-Spartiti and i apsolutly hate playing flute
A good place to find sheet music for modern music is www.musicroom.com
sheetmusic.com
e-chords.com
Google it - His daugther has it and is for sale !
I don't know where, but look under the song's name Good Riddance. It was released on the album Nimrod, so if you can find Nimrod in sheet music it should be there.
Online: Music Room or Horsegirl15