The songs are different in each advertisement, you'll have to be more specific as to which ad.
I tried to find this song for ages - if it is the same advert that i am thinking of - it is; in the hospital by friendly fires!
I'm No Superman by Lazlo Bane. It is the theme song of the comedy show Scrubs.
skrillex - bangarang
Passion Pit by Sleepy Head - this is an excellent song!
I don't know what ad you're referring to, each ad has a different song. Your best bet for finding it would be looking up the specific ad on Youtube. Once you find it, the song is probably a topic of discussion in the comment section.
The Silent Comedy - Bartholomew
the cure - close to me
Passion Pit - Sleepyhead
the song is mos def- twighlight speedball
The intro to crazy train by ozzy osbourne
la roux - going in for the kill
Swollen summer by The bravery