Brandon Davis breaks his 48 hours of sobriety by draining every freckle from his infamous display of couthless character reports Page Six...

RECENTLY rehabbed oil heir Brandon Davis is hitting the bottle again. At the launch party for Paris Hilton's debut album at Suite in Miami, a drunken Davis climbed onstage and announced to the crowd, "I wrote a special new song called 'Firecrotch,' and it's for Lindsay Lohan!" He proceeded to ramble on, reminding folks about his infamous online video rant against the actress, which led to him checking into rehab in the first place. An insider tells us the "Firecrotch" song is real and was produced by Scott Storch, who twiddled knobs on Hilton's album. Sounds like rehab didn't do much for Davis - who was also seen blotto on Sean Combs' yacht in St. Tropez recently.