Sources

Stephanie Ditta: The New Most Popular Tweet Of All Time - http://t.co/66LI2445

Clusterstock: President Obama's 'Four More Years' Becomes The Most Popular Tweet Ever

Taylor Lorenz: Obama beats out Bieber for Most Popular Tweet Of All Time: http://t.co/4AHNrn1M

BuzzFeed: This tweet. Amazing. http://t.co/hcTl7U6g

The Daily: The (new) most popular tweet ever http://t.co/S9F823dV via @buzzfeed

Ben Smith: RT @remy_kay: Holy crap, that was fast. RT @BuzzFeedBen: The New Most Popular Tweet Of All Time http://t.co/OLY8LW2I via @fwd

David Pogue: Only 22 minutes after posting, there's a new world record for the most-retweeted tweet: http://t.co/1Hmp8Su1

Jamie Mottram: The most popular tweet of all time was tweeted 38 minutes ago. http://t.co/qPFlaca9

Anthony De Rosa: The most retweeted tweet of all time http://t.co/pAEMOMDw

BuzzFeed: The New Most Popular Tweet Of All Time http://t.co/iJWKMuXM

Ben Smith: The New Most Popular Tweet Of All Time http://t.co/XnopJX97 via @fwd