7. Taylor Swift
Twitter handle: @taylorswift13
Joined Twitter: Dec. 6, 2008
Followers: 20,399,623
First tweet: Dec. 6, 2008. "apologizing to a very needy cat for being gone so long."

If only that poor cat knew what was to come. Swift's time on Twitter has been like a personal timeline. She's sold close to 16 million records in that span, had seven Top 10 singles, won six Grammy Awards and one particularly memorable MTV Video Music Award that introduced "I'ma let you finish" into the American lexicon.

Even without her onstage run-in with Kanye West, Swift's given her Twitter followers quite a bit to talk about. She dated Joe Jonas of bygone pop act The Jonas Brothers from July to October 2008, Twilight actor Taylor Lautner from October to December 2009, breakup song muse John Mayer from late 2009 until early 2010, actor Jake Gyllenhaal from October 2010 to February 2011 and Kennedy Family scion Conor Kennedy from July to October of this year.

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