So, here's how it works:

1. Open your library (iTunes, Winamp, Media Player, iPod, etc).
2. Put it on shuffle.
3. Press play.
4. For every question, type the song that's playing.
5. When you go to a new question, press the next button.
6. Don't lie and try to pretend you're cool...

Opening Credits:

Lucifer - SHINee

Waking Up:
I Miss You - Sam Concepcion  (what. first thing in the morning and this? xD)

First Day At School:
La La La - BigBang

Falling In Love:
Someday - UKISS

Fight Song:

Love Like Oxygen - SHINee    (............huh.?)

Breaking Up:
Nu Abo - f(x)

Prom:
Man Man Hani - UKISS    

(oh that must be a cool prom! xD)

Life is Good:
Love Ya - SS501

Mental Breakdown:
Oh! - SNSD

Driving:
Bad Girl - BEAST

Flashback:
ME - Super Junior M

Getting Back Together:
Beautiful - BEAST

Wedding:

Happy Together - Super Junior  

Paying the Dues:
Ring Ding Dong -  SHINee

The Night Before The War:
Change - HyunA feat. Junhyung of BEAST

Final Battle:

Please - Kim Hyun Joong      

(the heck.......?)

Moment of Triumph:

Sapphire Blue - Super Junior


Death Scene:
Super Girl - Super Junior M              

(...so... i'm a girl in my movieee??? DD:)

Funeral Song:
Twins (knockout) - Super Junior          

(.........seriously.... in a funeral??? )

End Credits:

Taeyang - Where you At.