As 2012 comes to a close, top social sites are remembering the year that was. On Twitter, President Barack Obama's "Four more years" tweet became the most popular post of the year—and of the 6-year-old site's history—with more than 760,000 retweets
Sony Pictures Television
With Tony Danza marking his 63rd birthday on Monday, join us for a look at what he and the rest of the cast of "Who's the Boss?" are up to today.