During her sit down with host Jimmy Fallon on Thursday, he tells the "Lover" singer that he has a video that her mom, Andrea, recorded of her after she got Lasik surgery.
"Your mom may or may not have taped you after surgery," Fallon told a shocked Swift. "And she gave us the video!"
"For the television?!" Swift exclaimed. Fallon explained to his audience that, "This is the world premiere. Check this out. This is Taylor Swift, post-surgery. You were, like, freaking out over a banana."
The one-minute video then shows a drugged-up, post-op Swift attempting to eat a banana and almost having an emotional breakdown when she didn't pick the one she wanted. In another clip, she's eating her banana in bed and her mom tells her to not fall asleep while she's eating.
Swift couldn't believe that Fallon had managed to get in touch with her mom, and then talk her into getting the hilarious candid video.
"Don't be mad at me!" Fallon said, after playing the clip for the audience. "We watched it in the office like 20 times today. I was like, 'Oh my god, I cannot believe this is real."
"I can't even be mad. I'm just impressed that you infiltrated by family," Swift said, stunned. "I don't even know how you did that! Nobody has my mom's number."
Swift's appearance on the late-night talk show host comes days before she's set to perform as the Saturday Night Live musical guest this weekend. Earlier in the day, SNL's Twitter posted a promo for the upcoming show, which will be hosted by Fleabag creator and star Phoebe Waller-Bridge.
Speaking with Fallon, Swift teased what songs she's going to be performing during her appearance on SNL, while still remaining, appropriately, "a little cryptic."
"I'll do 'Lover,' but in a way I haven't performed it before," Swift revealed. "And then I'm going to do a song that I have never performed before at all, live." So we'll all get to see what the songstress brings to the stage when SNL airs live, coast-to-coast, on Saturday at 11:30 p.m. ET, 8:30 pm PT on NBC.
In the interview she referenced everything from the 2009 MTV VMAs to West's song "Famous," which reignited bad blood between the pair in 2016.
"I started to feel like we reconnected, which felt great for me -- because all I ever wanted my whole career after that thing happened in 2009 was for him to respect me," Swift said of that period. "When someone doesn’t respect you so loudly and says you literally don’t deserve to be here -- I just so badly wanted that respect from him, and I hate that about myself, that I was like, 'This guy who’s antagonizing me, I just want his approval.' But that’s where I was."