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KISS took the stage for the first time since Ace Frehley 's untimely death Friday ... and the legendary guitarist was sorely missed.

The band paid tribute to their fallen brother during their KISS Kruise: Land-Locked in Vegas event over the weekend, with a beautiful moment of silence to reflect on what he meant to them.

Paul Stanley said, "We certainly had differences but that's what family is about."

The crowd solemnly raised candles in remembrance of the icon before ending the moment of silence and breaking out into a chant of "Ace, Ace, Ace!" to celebrate the impact he had on their lives. Getty

Ace was a founding member of the group in 1973, but left in 1982. He rejoined in 1996 before leaving for good in 2002.

As you know ... Ace passed away Oct 16 as a result

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