Facial piercings, gauges, tattoos
As for boots, I think the above-the-knee thing is a fad that'll look ridiculous, but the to-the-knee boot is classic.
I don't think Kim Kardashian's hair is a fad -- it's just long hair with a loose curl -- but SHE is a fad that should be over soon. I'm not even sure why she's famous.
Oh, and Tom's shoes. They're cute, but surely people are going to figure out soon that they're only a step above dollar-store flip-flops in quality, and they're really expensive for what you get. I can't buy into the "donate a pair" concept; I prefer to choose where I donate my money.