Luke arrived on Bespin because The Force told him that his friends would be double-crossed and left both under custody and carbonite. However, even before Leia managed to tell him, he still had to suspect it was a trap.
Oh, it was a trap, all right. A trap of pure, unadulterated swagger!
Now, young Skywalker would have to deal with not only Boba Fett and Darth Vader, but an Internet-fueled dance craze that was cool at first, but is just now starting to border on irritating.