The hard-living heavy rock legend has battled serious health issues in recent years, forcing him to scale back on his fabled alcohol intake and prompting his band to reschedule concert dates.
But he recently urged fans to stop worrying about him, insisting he was doing fine.
He told Classic Rock, "I'm sick of the f**king, 'Are you going to die?' line of questioning. It's getting really old, that question. I’m alright. I'm going out there and doing my best. I have good days and bad days but mostly I've been doing alright. The last tour of the States was very good."
And Lemmy, who turned 70 on Christmas Eve (24Dec15), told the publication he had no intention of retiring, adding, "It's when you get to 60, everything starts to go pear-shaped. Everyone thinks that becoming an older guy is easy, but you never consider it fully. It comes as quite a shock."
Lemmy's manager confirmed the news the rocker had died on Monday afternoon (28Dec15).
His death comes a month after the passing of original Motorhead drummer Phil Taylor.