Barry Gibb received the Grammy Lifetime Achievement Award Saturday on behalf of the Bee Gees, which will air on the Grammy ceremony Sunday, but said it would be a bittersweet moment without his late brothers Robin and Maurice Gibb there to share in the award.

“Of course there will [be a void],” Barry Gibb told Entertainment Tonight. “But I always believe they’re close.”

Robin Gibb died in May 2012 after battling colon and liver cancer, and Robin’s twin Maurice died to complications following a twisted bowel in 2003. Another brother who had a successful singing career in his own right and was not part of the Bee Gees, Andy Gibb, died of the heart condition myocarditis in 1988.

When thinking about the disco era of the 1970s, the Bee Gees absolutely come to mind along with 1977’s Saturday Night Fever star John Travolta, who sent a special message for Barry prior to Sunday’s award ceremony.

“Barry, you know I love you,” John Travolta said. “Thank you so much for everything you’ve done for me and everything I’ve done for you.”

Barry Gibb remembers his late brothers ahead of #GRAMMYs Lifetime Achievement Award: http://t.co/k12TZ53XlO pic.twitter.com/XR5jPHFGlb

— EntertainmentTonight (@etnow) February 7, 2015

The four brothers had a slew of number one hits in the 1970s and early 80s, but Barry Gibb told ET he prefers How Can You Mend a Broken Heart and Lonely Days over perhaps their most famous hit, Stayin’ Alive, because of the high notes in the disco anthem.

Barry Gibb acknowledged the impact the movie and the soundtrack, which featured several Bee Gees tracks, had on the culture of the world in the disco era.

Barry Gibb wraps up an amazing evening here in LA. Thanks @GRAMMYFdn so much. #YouShouldBeDancin' pic.twitter.com/K6FLvktjdc

— Windham High School (@WHSJaguars) February 8, 2015

“Saturday Night Fever is something now that everybody knows about all over the world,” Gibb said.

Barry Gibb continues to record and perform and has plans for a new album and tour with his 37-year-old son Ashley.