Celebrities were far too busy on Twitter spreading holiday cheer this Christmas to bother going to the meadow and build snowmen. Jessica Simpson gave her fans the present of announcing that she's pregnant with her second child, while Rihanna gave the Internet the gift of more photos of herself. Other stars like Justin Bieber and Emma Watson tweeted messages wishing their followers a Merry Christmas, while Ted Nugent gave animal rights activiists plenty of ammunition for the new year.