Great idea!
One song that reminds me of Logan at the end of last season is Lifehouse's Hanging by a Moment. He only had Veronica in the end and he felt if he lost her he had nothing else to lose. Lyrics can be found here,
Hanging by a Moment
I always really liked Cindy's choice of Charm Attack-mainly describing his 09er ways. Lyrics are here,
Charm Attack
Of course now I'm on a mission to find the perfect song that is the very essence of Logan, why we really love him, etc. I know there's one out there.....