“My favorite Gwen Stefani song – I like a lot of her songs and I really like her last album – but I think I gotta go with ‘Underneath It All,'” he says. “I love that song. I think it’s such a cool record.”
Watch PEOPLE Cover Story: Sexiest Man Alive — Blake Shelton, available now, on PeopleTV. Go to PeopleTV.com, or download the PeopleTV app on your favorite mobile or connected TV device.
For more of Shelton’s revealing interview — including his life with Stefani — pick up the latest issue of PEOPLE, on newsstands Friday.