Can you believe Twitter is seven years old already? OK! News: The Best Celebrity Tweets of 2012 Since it began, Twitter has changed how celebrities communicate—for better and worse. Check out my selection of seven tweets to celebrate seven years, and make sure to follow us on Twitter @OKMagazine! Watch: Nicki Minaj Has a Major Wardrobe Malfunction Twitter founder Jack Dorsey sent the very first tweet ever back on March 21, 2006. just setting up my twttr — Jack Dorsey (@jack) March 21, 2006   Through the years, the famous have sometimes used Twitter for major moments, ... Read More