Katy Perry swept the white carpet at the MGM Grand Garden Arena for the 2012 Billboard Music Awards in Las Vegas, Nevada, last night.

Keeping with a purple colour theme, the singer wore a Blumarine Fall 2012 gown with an open back.

Her iced-out metallic lilac drop-waist gown features a bodice covered with iridescent sequins before cascading down to a lightly embellished chiffon skirt.

Katy’s hair and makeup don’t work for me.

The purple curly locks and deep-plum-purple lip shade feel too heavy for this spring-like Fall dress.

A selection of stacked Misaki bangles completed her look.

Credit: Style.com & Getty