Opening Credits: Business Time - Flight of the Conchords

Waking Up: The Calculation - Regina Spektor

First Day of School: Dinosaur - Ke$ha

Falling in Love: American Boy - Estelle feat. Kanye

Fight Song: Boom - Flight of the Conchords

Breaking Up: Foundations - Kate Nash

Studying/Working: Hello/Goodbye - Glee Cast

Life: The Nosebleed Section - Hilltop Hoods

Mental Breakdown: Wuthering Heights - Kate Bush

Sunny Day: Alfie - Lily Allen

Rainy Day: It's Raining Men - The Weather Girls

Party/Dance Music:  Don't Stop 'till You Get Enough - Michael Jackson

Driving: Into the Groove - Madonna

Sleeping/Dreaming: Pump It - Black Eyed Peas

Nightmares: Your Love is My Drug - Ke$ha

Flashback: Billionare - Travie McCoy

Wedding day: Hot 'n Cold - Katy Perry <-- FUCCKKK you know the video clip?

Birth of a child: The Most Beautiful Girl - Flight of the Conchords

Final Battle: Toxic - Britney Spears

Death Scene: Come on Eileen - Dexy's Midnight Runners

Funeral Song: Back To Black
 
End Credits: Teenage Dream - Katy Perry

[I underlined the ones that worked]