Sharapova, Wozniacki and Serena tweet up a storm at WTA Finals

SINGAPORE -- The WTA's Elite Eight spent the morning practicing and the evening getting dolled up for the official draw ceremony for the season-ending WTA Finals. Then, armed with their ubiquitous cell phones, they tweeted and instagrammed the heck out of the whole evening. 

Here are the best mobile dispatches from the night. Warning: selfie alert!