Try to peel your eyes away from SJP's dope fuchsia Chanel bag and focus on her sweater. Like the fashion guru, I suggest you do the diagonal. No, it's not a nasty dance, but rather a fresh styling technique. I've been doing the diagonal for months now — I'm smitten with the casual prep vibe. Check it, all you need is a lightweight sweater and a nimble thumb. Get it? Got it? Good. Oh yeah, this one's a unisex thing, so go and spread the news to your lovah.