Music of the OC

Super Furry Animals	Hello Sunshine		Lyrics	Playing when Seth and Summer have sex, or are about to. When Seth has his 2nd chance with Summer, to when Theresa and Ryan talk.
Mojave 3**	Billodity	-	-	When Ryan and Seth, and when Marissa and Summer talk about sex.
The Fire Theft	Summertime		Lyrics	When Seth goes to have a 2nd chance with Summer.
Squirrel Nut Zippers	Anything But Love		Lyrics	Playing at the singles mixer.
Mastersource*	Dreamtime	-	-	I think its the song playing when Marissa and Sandy talk.
Bob Seger *	Night Moves	-	Lyrics	Playing in the background when Julie and Luke have their scene.
Ryan Adams	Wonderwall		Lyrics	Seth sweeps Summer off of her feet at the end of the show.

*	artist not on iTunes, but explore anyway.
**	artist is on iTunes, but song is not, but go, explore.