Bieber riles up his young fans during a Miami concert. Plus: Channing Tatum, Rihanna, Kim Kardashian and more

WELL RED

Mary-Kate Olsen makes her presence known in an attention-grabbing scarlet coat while out in New York City on Thursday. Just a day before, the stylish star unveiled her juniors clothing line for JCPenney, Olsenboye, with sis Ashley.