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 using his iMac computer's built-in webcam…. He's made 33 videos. His most popular – how to play Jason Mraz's 'I'm Yours' – has been viewed 200,000 times on YouTube"; and UK musician Justin Sandercoe gives video lessons in his own site, Justinguitar.com, which "attracts 600,000 viewers a month," according to USATODAY. Sandercoe's "lesson on how to play Guns 'N Roses' 'Sweet Child o' Mine' has picked up more than 2 million views." Through all these digital resources, music learning is getting a big boost. Joe Lamond, president of the National Association of Music Merchants, a trade group for music stores (where most guitar lessons are held), says the growth of online video lessons has paid off with more-attentive students." He credits the Internet and videogames like Guitar Hero for the fact that guitar sales are up 3%, he told USATODAY.