Followers: 5.7 million
Sample tweet: "Now I'm dancing around my room alone to @pink's greatest hits cd."
Many a teenager (and even a good number of adults) can hum one of Taylor Swift's 12 Top 10 U.S. country hits. The award-winning country starlet has skyrocketed to superstardom since the 2006 release of her debut single, "Tim McGraw." If her success story has played out in a string of Grammys and magazine covers, consider the songbird's 140-character updates as the CliffsNotes. She may not kiss and tell as often as some would like, but she will give you a window into the life of a young megastar who seems to be as adorable and happy as her publicist would have you believe.