We know by now that first lady Michelle Obama isn't afraid to get on the dance floor, and this time, FLOTUS has taken her grooves to Nickelodeon's "iCarly." Obama will appear in the January 16 episode as part of her Joining Forces initiative that supports military families, Entertainment Weekly reports. In the (adorable) clip, Miranda Cosgrove's Carly and her pals are given a verbal pat on the back by the first lady, who tells them she's proud of the way they set up a webcast to celebrate the birthday of Carly's dad, an Air Force colonel, when he couldn't make...