Hot pink, grey and turquoise. Red, black, yellow, grey and white. I also like finding one piece that already has a ton of colors in it then mixing it with something less crazy like jeans or neutral pants or skirt.
One of my groups at Polyvore is having a crazy colors contest and there are currently 1400 entries all so wild and definitely crazy. Tons of ways to do this trend. Here's how I would do it
Candy Apple. I want those shoes so bad. I think I've used them in 3 sets already!