The Warning: Mexican rock trio's viral Metallica cover journey

The recent appearance of Mexican rock band The Warning on a global stage has reignited massive interest among Thai music fans, particularly due to their high-energy collaboration with Thai artist "Nene Myra" during the grand finale of America’s Got Talent 2026, where they delivered a powerful rendition of the rock anthem "Seven Nation Army" that captivated audiences worldwide.

Before evolving into an international rock powerhouse with a devoted global fanbase, the three Villarreal sisters—Daniela “Dany” Villarreal on guitar and lead vocals, Paulina “Pau” Villarreal on drums, and Alejandra “Ale” Villarreal on bass—started playing music together as young children in Mexico, slowly honing their craft and building their reputation through online platforms before transitioning into professional musicians.

A major turning point that propelled The Warning beyond Mexican borders occurred in 2014 when the three sisters uploaded a video covering Metallica’s legendary track "Enter Sandman" to YouTube. At the time of the recording, Dany was 14 years old, Pau was 12, and the youngest sister, Ale, was only 9 years old.

Despite their tender ages, the trio's raw musicianship and technical proficiency shocked viewers around the globe. In particular, drummer Paulina drew widespread praise for her astonishing energy behind the drum kit, eventually catching the attention of Metallica lead guitarist Kirk Hammett.

Stock photo for illustration only, not from the actual event

The explosive online traction pushed their view count past the million-mark in a short span, currently accumulating over 27 million views. This viral clip served as the ultimate launchpad, catapulting The Warning onto the international stage and leading to an invitation to appear on The Ellen DeGeneres Show in 2015, followed by a summer music program at the prestigious Berklee College of Music in the United States.