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Their parents are probably so proud. And so, so nervous.

I'm sorry to inform you of this, but the three Mexican sisters who make up The Warning are already way more metal than you, and they're not even old enough to drive a car. 14-year-old guitarist/vocalist Daniela, 12-year-old bassist Paulina and 9-year-old drummer Alejandra all look like adorable young ladies, but from the way they shred through Metallica's 'Enter Sandman,' you just know that beneath those sweet exteriors, lie things dark and unknowable. And not just because they're teens/tweens.

They're about one-third of the way toward raising the $30K they need to attend the Berklee College of Music's summer program, though I'm not sure they need the help. Here are some of their other songs: