Welcome to Twitter Buzz, a daily roundup of notable tweets from famous folks. Today, the internet reacts to Rick Perry dropping out of the GOP race, Solange Knowles makes a vague tweet that could be about Blue Ivy, Hoda Kotb ponders flossing in public, Glee's two gay dads, Rihanna shares some sexy vacation pictures, and plenty of people had something to say about Newt Gingrich's "open marriage" preference.
