Taylor Swift ’s song “I Knew It, I Knew You” was a surprise for production members of Toy Story 5 , who were unaware that the megastar contributed a track for the upcoming film. Variety reports that the film’s VFX supervisor, Thomas Jordan, discussed the song’s origins during a panel at SXSW London on Friday (June 5). Apparently, Jordan had known about Swift’s tune since February, long before most of the team. “Turns out, Taylor Swift is a huge ‘Toy Story’ fan like many of us,” Jordan said during the event. “She actually saw an early version of the film, she requested to see it before it was finished and she wrote the song and then asked us if we wanted it. And we said, ‘Uh, yes! Yes we do.’” “That was in February, so we’ve had to keep it a secret ever since then,” he added. The VFX supervisor explained that “a very small group” of Toy Story 5 team members knew about “I Knew It.” To keep the secret while showing the movie to early press and Pixar-Disney staff, a “decoy version” of TS5 had to be created.…