Taylor Swift wore a "no its becky" T-shirt. Credit: Splash News Online

Taylor Swift just won the week. The pop star, 24, got in on a meme about her on Wednesday, Sept. 24, referencing a fan-favorite joke while in New York City. 

Swift stepped out in a yellow T-shirt reading, "no its becky," paired with short maroon plaid bottoms, an oxblood purse, and black booties. 

The phrase is a reference to a Tumblr post involving Swift, which recently went viral. The original message on Tumblr showed a vintage high school photo of Swift wearing a tiara. 

"This is a picture of my friend Becky," the post read. "She used to be a happy, popular girl until one night she snorted marijuana at a party. She died instantly. Please, don't do marijuana. It's the most dangerous drug out there. Please don't wind up like Becky."

Another user quickly responded, "Pretty sure that's Taylor Swift," prompting a commenter to shoot back, "no its becky," inspiring Swift's shirt. Swift publicized her knowledge of the popular post, which has been shared more than 30,000 times, when she liked it on Tumblr. 

Gearing up to release her next album 1989, Swift shared a Polaroid photo of herself in the shirt via Tumblr, reading "T.S. 1989." She captioned the image, "I'm kind of rethinking the album cover."