It is, sadly, still winter in the Northeast. Shorts will remain in the closet for another few weeks; swim trunks a bit longer than that. In Miami, though, it is warm, balmy, perfectly Miami-like. And Justin Bieber, there to shoot a music video, is dressing with full respect for the Floridian climate. The pants are pink and pleated; the shoes retiree white; the jersey the Miami Heat’s “Vicewave” edition. (The back reads “Bieber.”) The hockey stick? That’s a little more Canada than Florida. But we’ll let it fly. Because the hat just booked a room at the Fontainebleau.