Perry poses with a Katycat in Japan. Plus: Ryan Gosling, Maggie & Viola, Jessica Simpson and more

IF IMITATION IS ...

... the sincerest form of flattery, then Gwen Stefani is surely smiling about Miley Cyrus's new look. Cyrus rocked an outfit, hairstyle and stance much like Stefani's at the iHeartRadio Music Festival in L.A. Friday.