Queen guitarist Brian May is among the many musicians who have paid tribute to "original and dazzling" Eddie Van Halen following his death at the age of 65.
The man described as "Mozart for guitar" died on Tuesday after a "long and arduous" battle with cancer.
May said in an Instagram post: "Completely gutted to hear the sad news. This wonderful man was way too young to be taken. What a talent - what a legacy - probably the most original and dazzling rock guitarist in history.
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"I think of him as a boy - an innocent prodigy - always full of joy, always modest - and those truly magical fingers opened a door to a new kind of playing.
"I treasure the moments we shared. His passing leaves a giant hole in my heart. RIP Ed Van Halen. Bri".
Eddie's son, 29-year-old Van Halen bassist Wolfgang, announced news of his death with a statement on social media.
He said: "I can't believe I'm having to write this, but my father, Edward Lodewijk Van Halen, has lost his long and arduous battle with cancer this morning.
"He was the best father I could ever ask for. Every moment I've shared with him on and off stage was a gift.
"My heart is broken and I don't think I'll ever fully recover from this loss."
Wolfgang added: "I love you so much, Pop."
Valerie Bertinelli, Van Halen's first wife and Wolfgang's mother, shared a touching tribute and revealed she was at his side when he died.
She wrote: "40 years ago my life changed forever when I met you.
"You gave me the one true light in my life, our son, Wolfgang. Through all your challenging treatments for lung cancer, you kept your gorgeous spirit and that impish grin.
"I'm so grateful Wolfie and I were able to hold you in your last moments. I will see you in our next life my love."
Bertinelli was married to Van Halen from 1981 to 2007. TMZ reported Van Halen's current wife, Janie Liszewski, was also by his side when he died at a hospital in Santa Monica.
A message on the official AC/DC twitter account described Eddie as a "guitar wonder, his playing pure wizardry"
It added: "To the world of music he was a special gift. To those of us fortunate enough to have met him, a very special person. He leaves a big hole in a lot of hearts. To the van Halen family my heartfelt sympathies. Angus."
Kiss singer Gene Simmons told BBC Breakfast: "I would urge you, take young people by the scruff of the neck and force them to sit down and stop texting and tweeting just for a second and introduce them for the first time to the wonder of Eddie Van Halen and the band.
"Let them hear greatness, let them witness the joy this kid had and the amazing God-given gift that he had. And you may change a few minds, I'm fairly convinced of it..."
Revered guitarist Eddie was Van Halen's creative force as they blurred the line between hard rock and heavy metal on their way to becoming one of the biggest bands in the world in the 1980s.
Van Halen, reportedly a heavy smoker who fought alcoholism, had battled health issues. He first received treatment for tongue cancer in 2000 and the subsequent surgery removed about a third of his tongue.
He was declared cancer-free in 2002. It was reported last year that Van Halen had been privately battling throat cancer for five years.
More tributes flooded in from across the music industry and beyond.
David Lee Roth, Van Halen's former bandmate, posted a short message alongside a black-and-white picture of the pair together.
"What a Long Great Trip It's Been," Roth, also 65, said. He had three spells as Van Halen's charismatic vocalist.
What a Long Great Trip It's Been.. pic.twitter.com/M5pmkVi7hW— David Lee Roth (@DavidLeeRoth) October 7, 2020
The Who's Pete Townshend told Rolling Stone: "It's completely tragic that we have lost him.
"He was not just an innovative and stylish player with great taste, he was also a laidback virtuoso showman who just blew us all away every time.
"Every shredder today has lost their Master Teacher and Guide."
Pearl Jam's Mike McCready said he started playing guitar about a year after Van Halen's 1978 self-titled debut album was released, saying it sounded like the late musician was "from another planet".
He added: "Eddie was like Mozart for guitar. Changed everything and he played with soul."
Sammy Hagar, a former Van Halen frontman who departed the band under acrimonious circumstances, shared a picture of him and the guitarist together.
He said: "Heartbroken and speechless. My love to the family."
Nikki Sixx, co-founder of the rock band Mötley Crüe, described himself as "crushed" by the news.
He said: "RIP Eddie Van Halen. You changed our world. You were the Mozart of rock guitar. Travel safe rockstar."
Lenny Kravitz said Van Halen was "legendary" and a "musical innovator".
"Heaven will be electric tonight," he added.
British singer Billy Idol tweeted: "Rest in peace guitar legend Eddie Van Halen. We will miss you."
Black Sabbath co-founder Geezer Butler said Van Halen was a "true gent and a true genius".
He added: "Just when I thought 2020 couldn't get any worse, I hear Eddie Van Halen has passed. So shocking- One of the nicest, down to Earth men I have ever met and toured with. A true gent and true genius. RIP."
Red Hot Chili Peppers bassist Flea said: "Oh man, bless his beautiful creative heart. I love you Eddie Van Halen, an LA boy, a true rocker. I hope you jam with Jimi tonight. Break through to the other side my brother."
Star Wars actor Mark Hamill sent his condolences to Wolfgang, adding: "But take solace in knowing that he will be long remembered and live on forever as one of Rock's most extraordinary guitar virtuosos."
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Van Halen was born in the Netherlands and raised in Pasadena, California. He formed the band with his brother Alex, bassist Michael Anthony and singer Roth in 1974.
The group earned a name for themselves playing in Los Angeles clubs before their 1978 self-titled debut sold more than 10 million copies in the US alone and set them on the road to super stardom.
They followed their debut with Van Halen II, Women and Children First, Fair Warning and Diver Down and by the mid-1980s were one of the most popular acts on the planet.
In 2015, Rolling Stone magazine ranked Van Halen eighth on its list of the 100 greatest guitar players of all time.
The band was inducted into the Rock and Roll Hall of Fame in 2007.