Charlie Colin died after slipping and falling in the shower while house-sitting for a friend in Brussels, Belgium. He was 58.

Colin's dead body was only discovered a few days later after his friends returned home from their trip, according to his mother's account to TMZ. It is unclear how his fall happened.

On Wednesday, the pop rock band from San Francisco posted a tribute to its founding member alongside a black-and-white group photo showing Colin and members Pat Monahan, Rob Hotchkiss, Scott Underwood and Jimmy Stafford.

"When I met Charlie Colin, front left, I fell in love with him. He was THE sweetest guy and what a handsome chap. Let's make a band that's the only reasonable thing to do. His unique bass playing and beautiful guitar work helped get folks [to] notice us in [San Francisco] and beyond. I'll always have a warm place for him in my heart. I always tried to pull him closer but he had a vision of his own," the tribute read.

"You're a legend, Charlie. Go charm the pants off those angels," the band concluded.

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Messages of condolences poured in across Train's social media accounts -- on X, Instagram and Facebook.

"Oh no, I'm so sorry to hear this sad news. Condolences to all the Train family and Charlie's family, friends and fans around the world. God speed," commented one netizen on Instagram.

"Very sad to hear about Charlie's passing. Our times together on tour in the '90s were nothing short of wild hilarity and pure joy. All while rockin' across the nation, exactly what Charlie was born to do. I remember taking him wakeboarding one day while we were on the road and he just flipped out over how much fun it was. He was such a gentle soul. I had reconnected with him, which was nice and I know he was back to being very creative. Rest easy, Charlie," wrote the Pat McGee band.

"This is so tragic. My heart aches for all of you [who] called him a friend. He was a special soul. Sending love," said someone else.

"Your music changed my life and I am forever grateful. So heartbreaking to hear this. My condolences," wrote a different commenter on Facebook.

"Man, ugh. This hurts. I first saw Train in 1998 at a small bar in Houston. I helped them load their gear into the Uhaul trailer after the show. We chilled for a bit. Charlie was super cool, as was all the other guys. RIP Charlie. You are missed," commented another one.

Colin helped form Train with Monahan, Hotchkiss, Underwood and Stafford in 1993.

He contributed to the band's first three albums, "Train" in 1998," "Drops of Jupiter" in 2001 and "My Private Nation" in 2003.

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Train, Celebrity death, Celebrity deaths