TIGI Bed Head Hard Head Hairspray. I've been using this hairspray now for 2 years and even though I've strayed away and tried others, I've always come back to Hard Head! This is the ultimate universal hairspray.
The more you use, the harder it gets. So if you want a light hold, just do a fine mist over your hair, for a hard hold so your hair won't move at all, spray it until its hard.
I personally tease my hair pretty big and like it to stay big all day and so I will use this hairspray to help hold my teasing in, and then spray over the top of my hair when I'm done teasing it. It doesn't flake or anything.