The right frontal lobe is focally responsible for music and, if it is damaged, musical abilities are impaired. (Robinson, Ken, Sir, PhD. Out of Our Minds. p 14. NY: Capstone Publishing Ltd, 2001, 2011)
Study: music is primarily appreciated in the right hemisphere. Singing appears to be a right-hemisphere activity (e.g., if you sedate the left hemisphere the person can sing but not speak). (Storr, Anthony. Music and the Mind. p 34-36. NY: Ballantine Books, 1992.)
Estimates are that 10,000 hours of practice is required to achieve world-class level of mastery, in music as well as any field of endeavor. (Sternberg, Barbara, PhD. Music & the Brain. p 20-21. CA: Institute for natural Resources, Home-Study #2320, 2009).