Rihanna, Emma Watson, and Katy Perry at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. Credit: Christopher Polk/Getty Images , Kevin Mazur/WireImage (2)

Unlike other awards shows (we're looking at you, Oscars), the MTV VMAs give artists, actors and entertainers the chance to push the style envelope a little bit more than they usually would.

At L.A.'s Staples Center Thursday night, stars like Rihanna, Katy Perry and Emma Watson did just that.

Rihanna debuted a stunning cropped 'do, while Perry rocked a shimmering Elie Saab gown boasting teal and fuchsia sequin embroidery.

Harry Potter alum Watson -- looking more grown-up than ever -- showed off her long legs in a sexy, graphic print mini-dress.

Click through to see what all the attendees wore and tell Us: Whose VMA look was your favorite?