Celebrity Central / Top 25 Celebs
Credit: Stewart Cook/Startraks
Published: Monday June 17, 2013 13:00 PM EDT
More from PEOPLE
See More News
1 of 311
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.
Copyright © 2013 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.
In partnership with AOL