They call themselves The Warning, so consider yourself warned. The group is made up of three sisters hailing from Monterrey, Mexico, and oh yeah, they’re all younger than 16 years old. They’ve covered the likes of Metallica, AC/DC, Ozzy Osbourne and Lady Gaga over on their YouTube channel, attracting hundreds of thousands of views. Make sure to watch their cover of Metallica’s “Enter Sandman” above.

15-year-old Dany is considered the lead vocalist and plays guitar, 13-year-old Paulina rocks out on drums and 10-year-old Alejandra keeps it real on the bass. These ladies are not your average YouTube sensations, as they are already professional to the core. They have a website many bands would envy and the smarts to leverage their popularity into helping them raise funds to attend a summer camp at the Berklee College of Music and appear on The Ellen DeGeneres Show.

The Warning are also getting the attention of celebrities. Dee Snider shared the band's cover of Twisted Sister’s “We’re Not Gonna Take It” on his Facebook page.

The girls recently released their first original song called “Free Falling” over on iTunes and have announced that their first EP will come out on April 14. Head to their YouTube page to check out their other covers.

You Think You Know Metallica?