Sirius didn't know that much about bands or their dynamics or who were the stars. His comment about James had come simply because that voice was the one people often associated with bands. And well, James seemed the type. Sirius was not a follower, but he wasn't really trying to lead anyone the way James did. It just...happened at times, with Sirius.
His eyes lit up, and he nearly howled in laughter. Sirius loved it, loved it. It was a brilliant joke, to say nothing of what it did to his ego. "Brilliant, Moony, brilliant," Sirius spoke. He was so excited he could have kissed Remus, never mind the fact the band would likely never exist.
"You are brilliant either way," Sirius pointed out, grabbing his friend by the back of the neck and shaking his head a little. Oh it was such a high, and Sirius wasn't even on anything.