Brian McKnight -- Asked to Perform 'P***y' Song at Porn Awards

Brian McKnight is the hottest thing in adult entertainment -- because TMZ has learned, the singer was just asked to perform his new X-rated song at the OSCARS OF PORN ... aka the AVN awards ... and that's just the tip of the XXX iceberg.

Sources tell TMZ, AVN offered to fly McKnight out for the lavish awards gala in Vegas next January -- where he'd perform his new jam "If You're Ready to Learn," the adult-themed song that went viral on Tuesday ... containing the lyrics, "Let me show you how your p***y works."

But AVN isn't the only porn company trying to get into some McKnight action -- we're told YouPorn.com has also approached the singer, asking to license the song for its website's background music.

According to sources, several other XXX companies have reached out to McKnight as well, specifically because of the new song -- which McKnight plans to release next week on iTunes.