Hmm...I started listening to that song and noticed how easy the bass line is. Maybe I'll learn that really quick and record it and put it on YouTube along with a few other songs I can do the whole thing of to show off my awesome bass playingness. 8D
The first time I played, I did Dropkick Murphys - Flannigan's Ball with my brother on expert and got 96% on the bass. I know how to play that song on bass too, so it was really easy. XD
If you did bass on that song, it's really simple so you could probably do good on it. Watch the person on the right side playing it, since this is a co-op video. Thats the bass line on expert.