It's Cher's 69th birthday today (happy b-day!), a fact which has obviously had us pinning some of the singer's mega retro looks. And it turns out that Cher, who gave us many things including bangers Believe and If I Could Turn Back Time, is your unsung '70s style icon. Co-ords? Yes. Fringing? Yes. Crochet? Hell yes. Everyone's referencing her this season (mainly Kardashians — see this versus this, and this versus this), including you. Even though you didn't know it. Here are all the things hanging in your closet you didn't realize Cher wore before you…