Question1: What's your favorite Song on Greys Anatomy??

Question1: What's your favorite Song on Greys Anatomy??
Answer1: As we all know, that an impact music is very important to a TV show, so what are my favorite songs and what episodes were they in Greys Anatomy dvd??  I know that The show's main title theme during its first two seasons is an excerpt of "Cosy in the Rocket", by British artist Psapp.
***Volume 1 track listing:
The Postal Service "Such Great Heights"
Róisín Murphy "Ruby Blue"
Maria Taylor "Song Beneath the Song"
Tegan and Sara "Where Does the Good Go?"
Mike Doughty "Looking at the World from the Bottom of a Well"
Get Set Go "Wait"
The Eames Era "Could be Anything"
Rilo Kiley "Portions for Foxes"
Joe Purdy "The City"
Medeski, Martin & Wood "End of the World Party"
Ben Lee "Catch My Disease" (live)
The Ditty Bops "There's a Girl"
The Radio "Whatever Gets You Through Today"
Inara George "Fools in Love"
Psapp "Cosy in the Rocket"
Thirteen senses "Into the fire"
***Volume 2 track listing:
The Fray "How to Save a Life"
Moonbabies "War on Sound"
Jim Noir "I Me You"
Ursula 1000 "Kaboom!"
Anya Marina "Miss Halfway"
Jamie Lidell "Multiply"
KT Tunstall "Universe & U" [acoustic extravaganza version]
Metric "Monster Hospital"
Gomez "How We Operate" [radio edit]
Kate Havnevik "Grace"
The Chalets "Sexy Mistake"
Gran Bel Fisher "Bound by Love"
Get Set Go "I Hate Everyone" [clean version]
Foy Vance "Homebird"
Snow Patrol "Chasing Cars" [acoustic version] The iTunes version of the album also includes Sing-Sing's "Come, Sing Me a Song" as the sixteenth track.