Elton John, who is currently on his Farewell Yellow Brick Road world tour, said: "Hello Brian, it's Elton. Have a wonderful 80th birthday with Melinda and your family.
I'm in Denmark but I send you so much love. You've inspired me all my life. To me, you're the only real pop genius in the world and I love you very much.
Have the best day. "Meanwhile, Carole King said: "Hey, Brian. Wishing you all the best on your 80th birthday! Much love and be well!"Surviving Bee Gees singer, Barry Gibb shared: "Hi Brian, Happy, happy birthday to you my friend and I'm honoured to be able to say congratulations to you.
I've followed you all of my life, from the first time I heard you guys probably I Get Around and I was flawed by that. You're an inspiration.
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