Alejandra Villarreal

The Warning is a Mexican rock band from Monterrey, formed in 2013 by the Villarreal Vélez sisters: Daniela (guitar, lead and backing vocals, piano), Paulina (drums, lead and backing vocals, piano), and Alejandra (bass guitar, piano, backing vocals).

Their third studio album, Error, was released in 2022.

The Villarreal Vélez sisters were raised in Monterrey, and all received training on various instruments at an early age.

At some point in their childhood, Daniela and Paulina had selected guitar and drums as their primary instruments, respectively.

When the youngest of the three, Alejandra, selected bass guitar as her primary instrument at about age 7, the sisters decided to form a rock power trio in 2013.

They learned to play rock songs, often via the Rock Band video game series, and posted videos of their performances to YouTube.

In 2014, 12-year-old Paulina was profiled in the women's drumming publication Tom Tom Magazine.

The band first gained widespread notice later in 2014 when, at ages 9 through 14, their YouTube video in which they performed Metallica's "Enter Sandman" went viral among rock music fans, eventually earning more than 20 million views.

The video received attention from Metallica guitarist Kirk Hammett, who offered particular praise for Paulina, saying, "The drummer kicks maximum ass!"

Due to notice gained by their "Enter Sandman" video, The Warning decided to seek a record deal and develop their own songs.

They raised money through a successful GoFundMe appeal to record the six-song EP Escape the Mind, which was released in 2015.

During production of the EP, the band met producer Jake Carmona, who went on to contribute to Escape the Mind and their next three albums.

In April 2015, the band appeared on The Ellen DeGeneres Show.

During this period the sisters raised funds, including a donation from DeGeneres and the Target Corporation, to attend a five-week training program at Berklee College of Music in the United States.

They also gave two presentations at the TEDx conference at the University of Nevada in 2016 and 2017.

The Warning's first full-length album, XXI Century Blood, was released in 2017.

During this period they were invited to perform at the Mother of All Rock Festival in Monterrey, and also opened a show for The Killers in that city.

The band was known for practicing with the Rock Band video game series early in their history; designers returned the favor by including several songs by The Warning in the 2018 edition of the series.

Their second album Queen of the Murder Scene was released in November 2018.

They announced an extensive upcoming tour throughout North America in late 2019, though it was canceled due to the COVID-19 pandemic.

! scope="row" | 2019

! scope="row" | 2023

! scope="row" | 2023

In August 2020, The Warning signed a five-album deal with Lava Records, and began work on a new album with producer David Bendeth.

The song "Choke" was released in May 2021.

Later that year, The Warning appeared on the Metallica tribute album The Metallica Blacklist, performing another cover of "Enter Sandman", this time with singer Alessia Cara.

The six-song EP Mayday was released in October 2021, and The Warning embarked on a tour of North America in early 2022, performing more than 30 dates as headliners plus opening for Foo Fighters, Sammy Hagar and the Circle, and Stone Temple Pilots.

They released the single "Money" in March 2022, and the song reached no. 31 on the Billboard Mainstream Rock Airplay chart.

The full-length album Error, comprising the six tracks from the Mayday EP plus "Money" and seven new songs, was released in June 2022.

In July 2022, they embarked on a U.S. tour supporting Halestorm and The Pretty Reckless and appearing at festivals like Burlington's Sound of Music Festival, Iceberg Alley, Summerfest, and Upheaval, before resuming their headlining tour in August 2022.

In the Fall 2022, The Warning performed at additional festivals (Louder Than Life, Aftershock, Peninsula Tecate, Rock al Parque), supported a second US tour with Halestorm, a Canada tour with Three Days Grace, a Guns N' Roses tour stop in their home city of Monterrey, Mexico, and performed small-venue concerts in Las Vegas, California, and Lima, Peru.

The band supported Muse during several dates on the Will of the People World Tour in both Mexico and Europe.

In September 2023, they opened for Guns N' Roses again on two dates of the We're F'N' Back! Tour.

The Warning said they listen to "every type of music there is, from classical music to pop".

They named Metallica, Muse, My Chemical Romance, Pink Floyd, Queen, Paul McCartney, Neil Peart, David Gilmore, Placebo, Badflower, Paramore, K-pop and J-rock as musical influences.

Their female artist inspirations include Hayley Williams, Esperanza Spalding, Sheila E.., and Lzzy Hale.

The Warning have been described as a rock and hard rock band.