Songs from The Hills episode "Stress and the City"

does anyone know what songs these are and who sings them?
they go something like :

"Won't look back with regret, i'll take my chances"

"city attack" ?

"meet me at the catwalk"

"i'll stop the world and melt with you"-what girl sings that?

"so give me something to believe in"

"something's not right, i can feel it inside, something's not right"

"He and i had something beautiful"

All songs in that episode are located at this link: http://www.mtv.com/ontv/dyn/the_hill...isodeId=127038

plus online version ending song was: "We Are" by Ian Axel

http://songsuggestionoftheday.com/thehills/

provides listing and clips to help you figure out which is which.