Backless Style Showdown: Olivia Wilde vs. Amber Heard (POLL)

Amber: Pretty in Pink!
Amber Heard at the Elle Women in Hollywood event.
Olivia Gets Spotted!
Olivia Wilde sports spots in the UK.
Backless is back!

Both Amber Heard and Olivia Wilde were seen hitting separate red carpet events on Thursday, and each went with a backless look. While Olivia (at the In Time premiere in LA), went with a simple, full length frock, Amber (at a fragrance launch in Russia), stepped up the glam with a sparkly mini.

The question is — who rocked the backless look best?

Let us know what you think by casting your vote in the poll!