• HAYDEN PANETTIERE photo | Hayden Panettiere

Credit: Stewart Cook/Startraks

Published: Wednesday May 01, 2013 17:00 PM EDT

2013

HAYDEN PANETTIERE

In what might be the most demure neckline Las Vegas has ever seen, Hayden opts for sophisticated over sexy at the Billboard Music Awards with a tiered black gown, a golden clutch and pretty side-swept waves.