In "Don't Tell Me How to Live", which comes with a wild new video featuring the rap-rocker riding a penis-shaped rocket and performing in a church, Rock also compares himself to Bruce Springsteen and James Dean.
He sings, "I'm like Reverend Run or David Lee Roth/Like Springsteen b**ch, I'm the motherf**king boss/James Dean, s**t, I'm more like Brad Pitt."
He accepts he's "a little less pretty" than Pitt, but he "slings more d**k."
Pitt has not responded to the lyrics, but plenty of people have taken aim at Kid Rock over his boast.
"So now Kid Rock wants to compare himself to Brad Pitt. REALLY??? YOU BE THE JUDGE," one Twitter user wrote, alongside a side-by-side shot of the two stars' stomachs.
"There are men other men should probably not compare themselves to: MLK, Michael Jordan, John Lennon, Einstein, JFK, Prince, Gandhi, and Brad Pitt. Just resist the urge," another added, and a third joked, "So Kid Rock compared himself to Brad Pitt? The difference is that Pitt can still get more a** than a toilet; Rock is an a**hole whose so-called 'music' (past and present) belongs in a toilet."