John admitted that he loves the song and that he gets "a little chuckle" out of it because of the lyrics.
He's specifically talking about the lyrics: "We can leave the Christmas lights up till January", calling her "insane" because "everyone keeps their Christmas lights up until January."
"Normally I take my Christmas lights down on December 29th," he continues, sarcastically.
"So you don't like the song?" Shawn asked.
"No I love the song, I love your work on it" John continued, going on to remix the song himself as Shawn laughs.
His own version makes fun of Taylor's with the lyrics: "We can keep the Christmas lights up till January. And then about January 5th, we'll take the lights down. And then we’ll put 'em in a box and we’ll label that box Christmas Lights. Yeah, we'll put 'em in the attic until next December."
While some Tay Tay fans saw it as good fun, others were highly offended.
"John has no reason to bring her up unless to step up and support what’s happening right now. Which he isn’t," tweeted one user.
"They're trying so hard to be funny I have to laugh," wrote another.
For those who don't know, John and Taylor dated in 2009 for a hot minute when she was only 19-years-old. Fast-forward to their sudden breakup and Taylor released her seven-minute-long ballad 'Dear John' in 2010 that completely shunned him for using her.
"It was wrong, don't you think nineteen's too young to be played by your dark, twisted games when I loved you so."
In 2012, John said to Rolling Stone that: "I was really caught off-guard, and it really humiliated me at a time when I'd already been dressed down. I mean, how would you feel if, at the lowest you've ever been, someone kicked you even lower?"
In 2013, it was his turn to hit back with his own song 'Paper Doll'.
His lyrics "You're like 22 girls in one and none of them know what they're runnin' from. Was it just too far to fall? For a little paper doll" referred to Taylor assuming things weres serious between the two when they weren't.
So it's safe to say that John and Taylor have had an incredibly strained relationship ever since.
Shawn and Taylor, however, are really good friends.