In today's Tweet Beat, former Disney kids Demi Lovato and Miley Cyrus unite over a few tweets with the hopes that people will stop calling rail-thin celebrities "fat." Plus, Kim Zolciak's wedding photo, Lauren Conrad meets the little "Super Bass" girls, and Leah Remini's warning for all of her followers: You will be hearing about the color of her urine from time to time. (Warning: the following photo tweeted by Miley may be disturbing to some.)