Christopher Joseph Fronzak (born November 20, 1989), also known as Fronz or Fronzilla, is an American musician who is best known as the lead vocalist and founding member of the metalcore/rap metal band Attila.

[8] In 2011, Fronzak was featured in the From the Embrace song "La Flama Blanca", which appeared on the band's The Grind EP.

In 2012, Fronzak was featured in the In Dying Arms song "Bathed in Salt", which appeared on the band's album Boundaries, released in September 2012.

He also featured in the song "Love, Sex, Riot" from Issues' debut EP Black Diamonds, which was released on November 13.

[9] On April 1, 2014, he released his first song, entitled "Turn It Up", under the stage name Fronzilla as part of his hip-hop side project.

He shares one more son with his current spouse Hayes, born in 2022[17] Over the summer of 2020, it was confirmed that Fronzak had begun creating pornographic content for OnlyFans.

[23] A diss song entitled "Callout", which was released in 2013, featured numerous attacks against the likes of Jonny Craig, Ronnie Radke, Christofer Drew, and Mike Reynolds.

[24] On February 15, 2018, Attila self-released a sequel song titled "Callout 2" in which Fronz called out more than 50 people for different reasons, including Logan Paul, RiceGum, Bhad Bhabie, Harvey Weinstein, Offset, Martin Shkreli, Westboro, Buddy Nielsen, Jeffree Star, Danny Worsnop, Denis Stoff, Tim Lambesis, Frankie Palmeri, Conor McGregor, Kim Kardashian, Ronda Rousey, Tyler Carter, 6ix9ine.

[27] On August 22, 2018, during a Las Vegas concert, he assaulted a nearby security guard by punching him in the back of the head and then throwing his microphone.