Some 800,000 people have watched YouTube videos of musicians teaching them how to play Colbie Caillat's 2007 hit 'Bubbly' on guitar," USATODAY reports; Sting teaches "Roxanne" himself in Apple's GarageBand software, one of many music lessons in the application's latest version; "Edison Mellor-Goldman, 17, a Los Angeles-area high school student, likes to go home from school and make video tutorials … [Read more...] about Online music lessons taking off