Fenix Flexin's 'Rubberz' hit #58 on Billboard, but audio artifacts scream AI

Shoreline Mafia’s Fenix Flexin has a surprising solo hit on his hands with “Rubberz,” a track that’s cracked the Billboard Hot 100 at number 58. The surprise isn’t just the chart placement—it’s that the song, an ’80s UK synth-pop departure from his usual West Coast trap sound, is riddled with telltale signs of AI generation. While Fenix has denied the accusations, he’s done little to substantiate the denial, and the evidence is piling up faster than his streaming numbers.

Close listening reveals a graveyard of digital artifacts. The hi-hats are brittle, chorus vocals sound compressed down to a low-bitrate mess, and reverb tails cut off with zero finesse. Charlie Harding, songwriter and co-host of the Switched on Pop podcast, pointed out the “ghostly backing vocals” and “unnatural digital artifacting reminiscent of a 64kbps MP3 downloaded off of Napster”—a direct consequence of AI models training on low-quality, unlicensed copyrighted material. This isn’t just artistic choice; it’s the audible fingerprint of a machine.

The lyrical content is another smoking gun. The rhymes follow a rigid, simplistic AA, BB structure devoid of the internal or near rhymes you’d expect from an accomplished rapper. Lines like “Swipin’ cards and stackin’ chips, I saw you sinkin’ ships” are grammatically sound but narratively nonsensical—logical near-gibberish of the kind large language models produce. AI writing detectors flagged the lyrics, and even Claude identified multiple signs of synthetic generation. The chorus piles on the confusion: “Bankrolls on the table / Watchin’ local cable / Hatin’ that I’m able.” Able to what? The song never bothers to say.

Then there’s the performance problem. Live clips show Fenix awkwardly lip-syncing, seemingly unable to remember his own song’s unnatural flow. When he does sing, his voice can’t touch the vocal range or the fake British accent from the recording. The backing track often drowns out his real vocals entirely, with the DJ dropping it briefly in a transparent attempt to fake liveness. Even if AI detectors only give the audio a 20-30% probability of being synthetic, the supporting materials tell a more definitive story: the cover art and a promotional post were flagged as AI-generated with over 97% certainty. The entire package reeks of a corner-cutting experiment that’s paying off commercially, which raises an uncomfortable question about whether audiences or the industry actually care.