What are some songs that fit Alejandro and Heather?

Wellll, I'm sort of making a Alejandro and Heather mix tape type of thing, it's basically a collection of songs describing their relationship throughout the entire season. I have a few ideas, but I'm really looking for a couple of songs that describe how they didn't trust each other at the beginning of the season.

I have a few songs that I personally feel fit them well, so if you have any others, please, post some!

Heartbreaker- P!nk
Don't Lie- Black Eyed Peas
Toxic- Britany Spears
Monster- Lady GaGa
Don't Trust Me- 3OH!3
The Only Exception- Paramore