It's rap-metal duo Insane Clown Posse, whose fans are known as Juggalos.

BBC: Quiz of the week's news

Metal has done its best to change with the times the so-called hair bands, spandex-clad pretty boys, in the 1980s, even rap-metal in the '90s.

NPR: Kicking and Screaming, Metal Back in Music Spotlight

Mr. Morell says he'll work out to any old-school rap or hard-core metal.

WSJ: Business Partners Double Up for Exercise

Washington (CNN) -- Although Rage thinks Paul Ryan is just another cog in the "Machine, " that doesn't stop the Republican vice presidential hopeful from rocking out to the rap metal group's anti-establishment lyrics.

CNN: Ryan Rages Against the Machine