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KISS along with OG members Peter Criss and Paul Stanley are remembering Ace Frehley , the band's original lead guitarist, following his heartbreaking death Thursday.

Check out Peter's touching tribute shared on his website -- he confirmed he was with his "brother" along with his wife and Ace's family when he died peacefully in a hospital, where he had been on life support after suffering a brain bleed.

He also applauded Ace's legendary career, writing ... "As a founding member of the rock group KISS and in Ace's solo career, Ace influenced and touched the hearts of millions of people. His legacy will live on in the music industry and in the hearts of the KISS Army." Gallery Launch Gallery Getty

Paul, meanwhile, took to social media to share his favorite p

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