Speaking on stage, the exec paid tribute to the forward thinking mindset of Facebook founder Mark Zuckerberg.

"Mark is still a very young guy and he's going to run the company for a long time," said Rose. "He is really, truly one of the most mission-driven people I've ever met in my life."

He added that 'frictionless' sharing of songs could lead to a page full of nothing but "here's what your friend listened to" - which is why Facebook ...