We flip through some memorable looks before Sunday’s show, from glamorous Katy Perry to Rasta-inspired Christina Aguilera. By Jocelyn Vena Lady Gaga at the 2010 Grammys Photo: Getty Images The Grammy Awards are nothing like the Oscars when it comes to fashion. The approach is less about what’s trendy or appropriate and more about a star’s own personal style. And that means there are always hits but many times there are misses and then, too, as we’ve learned, there’s the Gaga, who can’t be defined as good, bad or otherwise. So with the Grammy red carpet set to kick off Sunday night, MTV News takes a look back on the best and worst of Grammy fashion. The Best Keri Hilson brought the glamour last year in a nude-colored fishtail Dolce & Gabbana gown that showed off the singer’s feminine side