The 62nd Grammy Awardsbrought out some of Hollywood's most fashionable couples, as music's big night ended up being date night. Gwen Stefani and Blake Shelton walked arm-in-arm down the red carpet on Sunday night at the Staples Center in downtown Los Angeles, and, inside, John Legend and Chrissy Teigen canoodled in their seats.These were the most stylish couples spotted at the Grammy Awards.Nick Jonas and Priyanka Chopra Jonas