Young Girl Band Covers ‘Enter Sandman’ [VIDEO] Nashville, TN, United States / 102.9 The Buzz Hayley St. John April 09, 2015 07:39 pm …in a badass way!! Fifteen, thirteen, and ten. That’s how old they are. A young group out of Mexico that calls themselves ‘The Warning’ covers Metallica beautifully. Parenting…you’re doing it right!