I heard this song recently on MUZU.

Its about an elderly couple who look to live a normal life with grandchildren, then they go out and act like thugs: drinking, graffiting etc.

It's really annoying me I am sure it has "act like were young" in the name as that's the words through the song.

Maybe one of these?

Sigur Ross - Hoppipolla - YouTube (http://www.youtube.com/watch?v=qmXMA34CeoQ)

Modestep - Sunlight (Official Video) - YouTube (http://www.youtube.com/watch?v=Bparw9Jo3dk)