Taylor Swift wrote an original song for "Toy Story 5."

Pixar; Kevin Mazur/Getty Images for iHeartRadio

Imagine a family-friendly brand with the initials "TS" that floods the market with bespoke merchandise. Are you thinking of "Toy Story" or Taylor Swift?For now, at least, they're one and the same. Swift confirmed long-simmering speculation this week when she announced her new single for the "Toy Story 5" soundtrack, "I Knew It, I Knew You," will be released on Friday."You knew it! My new original song 'I Knew It, I Knew You' for Disney and @Pixar's @toystory 5 will be yours on June 5th," Swift wrote on social media, making a nod to her most devoted detectives, who had collected Easter Eggs from across the internet that hinted at the collaboration for months."I've always dreamed of getting to write for these characters who I've adored since I was a 5-year-old kid watching the first Toy Story movie," Swift continued. "I fell instantly in love with Toy Story 5 when I was lucky enough to see it in its early stages, and I wrote this song as soon as I got home from the screening. Sometimes you just know, right?"Swift's admiration for "Toy Story" makes sense not just because she's a millennial who grew up with the classic movie franchise. The devotion she inspires from her own fan base has a lot in common with that of Woody, Buzz, and the gang. After all, few have proved better at turning sentimental affection into a money-making empire than Pixar.Swifties inadvertently became Pixar's promo team — and everybody won