Perfect work man. I was hoping you would get around to making a full picture of the Foo Fighters like this. Looks great with all of the members together even though I have seen some of these drawings before.
I also noticed that you placed their album covers in the background of the pic. That is a very nice touch actually. Not sure about the floor pattern but that is probably a minor complaint. Good job with mics and amps as well.
Overall, good work. I look forward to seeing what you will do with future work as a graphic designer.