Photo Credit: Gregory Shamus/Getty Images Taylor Swift kept things casual yet sporty as she attended the Knicks vs. Cavaliers game with her fiancé, Travis Kelce. The pop icon wore a plain black jacket, which she left unzipped for a bold, effortless touch, pairing it with a matching top underneath. She perfectly pulled off the laidback ensemble while still keeping the look stylish and fashion-forward. Taylor Swift styles her jacket in a daring wa…