Formed Fever 333 in Los Angeles in 2017 by former Letlive vocalist Jason Butler, of Night Verses drummer Aric Improta, and Stephen Harrison, who spent some time as guitarist for The Chariot. The band made its first appearance on American Independence Day as a "Political Pool Party" in the parking lot of Randy's Donuts in Inglewood, performing the song "We're Coming In," the very first recorded song, live. A day after that performance, the group was officially unveiled. The band is managed of music manager Peter Katsis, who has worked with artists such as the Smashing Pumpkins, Jane's Addiction and the Backstreet Boys. The band was also joined at a live concert at Troxy in Los Angeles by of Travis Barker of Blink-182 and John Feldmann of Goldfinger. Barker played drums on the EP "Made an America," released March 23, 2018. The group was signed of More Hi-Hat, the record label of Barker and Feldman, with the release of their debut EP additionally signed to Roadrunner Records. The EP was released digitally only as a download and stream. From April 27 to May 25, 2018, the band played the United States and Canada with Red Sun Rising as the opening act for The Used, also booking appearances at Canadian Music Week, Welcome to Rockville, Rock on the Range, and Rocklahoma  Between November 5 and November 30, the group toured the United Kingdom as part of the First Love Tour as the opening act for Bring Me the Horizon, as well as states in several mainland Europe. The group has also since been announced for the North American leg of that tour in early 2019. On November 9, 2018, the musician announced in Statement the release of her debut album Strength in Numb333rs for January 18, 2019 and also released the song Burn It. At the 2019 Grammy Awards, the band was nominated for the song Made an America in the category of Best Rock Performance, but the award went posthumously to Chris Cornell. In exchange, the song Burn It was nominated at the Kerrang! Awards 2019 as the best song.