Miranda Lambert arrived at the Academy of Country Music Awards in Las Vegas on Sunday night with her new boyfriend, Anderson East, on her arm. The singer, who looked smokin' hot in a high-slit yellow gown, stayed close to her other half and smiled sweetly while posing for photographers. The couple was first linked back in December, and the ceremony marks their first public appearance together. In addition to the duo's red carpet debut, Miranda took the stage with Billy Gibbons and Keith Urban for a performance of ZZ Top's "Tush" and won the award for female vocalist of the year. Keep reading to see more of their night.