Over-sharing these days is an understatement thanks to Instagram. Every single day our eyes are bombarded with real-time updates from our favorite celebrities. Whether it’s behind-the-scenes gems or selfies, getting up close and personal is a given in 2013. But believe it or not, there’s still a handful of top celebs without a profile on the photo-sharing site. We hope these six celebrities will bite the bullet and offer an inside look to their fascinating lives.