What song is played at the beginning of Season 4 episode 1 of Greek?

In the beginning of season 4 episode 1, the dean is speaking to the
graduates, and as he does so there's a song playing in the background.
Does anyone know what song that is? It sounds familiar, but I can't
figure it out. Here's a link to the video:
http://youtu.be/Rg2sHIxAnIo and it plays around 2:40