Elton John, Ricky Gervais and More Pay Tribute to George Michael

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Friends and fans are pouring their hearts out and paying respects after news came on Christmas that George Michael had died.

The iconic singer -- best known for his success in the early '80s with Wham! and then a solo career that kicked off with the hit, "Careless Whisper" -- died on Sunday at his home in London. He was 53.

NEWS: George Michael Dies at 53

Michael's good friend, Elton John, took to Instagram to honor the late singer.

"I am in deep shock. I have lost a beloved friend - the kindest, most generous soul and a brilliant artist," John wrote alongside a photo of him and Michael. "My heart goes out to his family and all of his fans. @GeorgeMichael #RIP."

British actor Ricky Gervaias was one of the first to post on social media, where he alluded to how difficult 2016 has been. "Unbelievable," he tweeted. "RIP George Michael."

And supermodel Linda Evangelista, who starred in the music video for Michael's iconic "Freedom! '90," shared a black-and-white photo with the singer on Instagram.

"I am beyond heartbroken and devastated by another tragic loss," she captioned the pic. "R.I.P. dearest Georgy."

MORE: Adele Dresses Up As Her Hero George Michael on Her Birthday

See how other stars have reacted to the news: