Lots of people have been asking how I get my hair like this. It's super easy. I have a lot of layers in my hair so that helps it out a bit. My hair also has slight natural wave.. but you don't even need any.
Wash and condition your hair as normal. Towel dry a bit. Section hair into 4-6 parts and twist each part into a small messy bun and fix with an elastic. I spray in john freida ocean waves beach blonde stuff in and hairspray. Sometimes I'll put gel in it before I put the buns in. Go to sleep.
In the AM I need to blowdry the buns a bit as my hair is thick. take em out, shake head, more hairspray, and voila. If needed you can curl some peices if they didnt get enough wave.