The Academy of Country Music Awards in Las Vegas on Sunday was a star-studded affair. Presenter Robert Pattinson may have had all eyes on him, but the red carpet and show brought plenty of great looks as well. Brooklyn Decker chose a tight Victoria Beckham number, and Rihanna hit the stage in a bright white Versace. Taylor Swift got glam in Elie Saab while Julianne Hough rocked a sexy Randi Rahm gown. Carrie Underwood went with purple Jean Fares Couture, and Reese Witherspoon wowed in Marchesa. There were lots of lovely ladies, but we want to know who you think was the best dressed of the night.