"Supernatural" season 10 spoilers reveal Demon Dean's singing power during Karaoke night, and also possibly meet a new lady love at the same bar.

TVLine teased "Supernatural" season 10 spoilers when it published a teaser photo of Demon Dean (Jensen Ackles) giving his own rendition of "Imaginary Lover" by Atlanta Rhythm.

Another photo shows him being flirty with the waitress, it's not clear if this is the same waitress that was earlier reported that Demon Dean will have a fling with.

Matt Webb Mitovich earlier dished out "Supernatural" season 10 spoilers when he wrote at TVLine.

"Indeed, Dean has a bit of the devil in him - as will be evidenced by an intense fling he has in the second episode back, with a tough but sympathetic roadhouse cocktail waitress named Ann Marie."

Earlier, Jensen Ackles revealed "Supernatural" season 10 spoilers to TVGuide at the San Diego Comic-Con panel when he said that Demon Dean will be very different because he's tainted with the Mark of Cain. "This is Dean's soul, but it's twisted."

He revealed that in the first few episodes alone, Demon Dean mauled three guys and killed two people.

Earlier "Supernatural" season 10 spoilers by E! News, Crowley will have to "watch his back" because Sam is blaming him for his brother's fate, and he will do anything to seek payback.

"When Sam finds out that his brother is a demon and confronts him for the first time in episode three, it's intense. He doesn't know that he's a demon at the beginning of season 10. But when he finds out his brother isn't just missing, he's a demon, it doesn't piss him off," Jared Padalecki, who plays Sam, told the website.

"He doesn't think Dean did it on purpose or anything. He gets pissed off at Crowley instead," Jared Padalecki said.