one good question

American composer and conductor Eric Whitacre spliced together nearly 250 submitted YouTube videos to form an online choir performing “Lux Arumque,” and then posted the assembled piece on YouTube.
Whitacre used social media — his blog, a Facebook page and YouTube — to assemble and audition singers for his piece. He sent the sheet music out [...]

Great video on the economics of Social Media and reasons it is now essential for profitable businesses.