What should i do!?

My friend is over my house and we were playing guitar hero 3 and my lil brother was there too and my friend did welcome to the jungle on medium and then they said i had to do it too. So i do it get a bad grade on it and my brother starts playing a DIFFERENT song so i go over there and say WTF why does he get to playa nother song!!?? now their both pissed and so am i please help