In the latest trailer for Ralph Breaks the Internet Sarah Silverman’s Vanellope von Schweetz meets a who’s who roster of Disney princesses. From Cinderella to Mulan to Moana, it’s great to see all of these iconic characters in one place — especially Princess Tiana, Disney’s first black princess. But some are having problems with her appearance — particularly her hair. Many fans have taken to Twitter to comment on the appearance of Princess Tiana from The Princess and the F…