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Chris Stapleton and Adele are two powerhouse vocalists who are major fans of each other. Adele says, “His voice is just incredible -- it’s like caramel.” And Chris loves her new album 25, including the hit lead single, ”Hello.”

“It’s stuck in everybody’s head, including mine and my wife’s,” Chris says. “It’s wonderful. She’s wonderful … not bad things to say about that lady.”

Adele covered Chris’s other band, The Steeldrivers, for her 2011 concert DVD Live at Royal Albert Hall.

According to the Hollywood Reporter, Monday night's "Adele Live in New York City" was the biggest TV concert in a decade with 11.3 million viewers. The last primetime concert special to do that well was "The Eagles Farewell Tour" in 2005.

Photo: Getty Images