Last week, Unlocking The Truth, a high school hardcore band with a combined age of just 38, netted a six-album record deal with Sony worth $1.7m (£992,000) having been discovered busking in locations around New York. Hot on their heels this week comes 10-year-old YouTube hit Audrey. Not much is known about the grinning diminutive metaller, seen here delivering a note-perfect rendition of Slayer's furious, frantic riff-a-thon 'War Ensemble' on guitar tuition game Rocksmith, other than that has already struck up a fearsome chemistry with screaming sister vocalist Kate and that she possibly rocks harder than you ever have or ever will. Kerry King would approve. Watch it and weep, guitarists.