At the Grammys in February, Demi Lovato led an all-star tribute to the Bee Gees alongside Little Big Town, Andra Day and Tori Kelly to celebrate the 40th anniversary of the group's seminal Saturday Night Fever. The Recording Academy and CBS later hosted a full concert special, "Stayin' Alive: A Grammy Salute to the Music of the Bee Gees," on February 14th with Lovato, Kelly, Day and Little Big Town all perform, along with Celine Dion, John Legend, Nick Jonas, Pentatonix and surviving Bee Gee Barry Gibb. The list of notables performing at the tribute also includes many of country music's biggest stars. "I'm going to be doing 'To Love Somebody,'" Keith Urban says. "I remember hearing the song a lot when I was growing up and always loving it. It's such a simple song. It’s just beautiful."Check out this exclusive gallery of images from the event, which airs Sunday, April 16th on CBS.