The game launches October 20
Activision is pretty good at getting celebrities to do comical commercials, and their latest bit involves James Franco and Lenny Kravitz promoting Guitar Hero Live. It showcases the live crowd aspect, which can boo you if you're doing terrible. Apparently it's terrifying.
I had a chance to see Lenny Kravitz live recently, and he's still got it. Also, I got to high-five him, so he's totally cool.