Elton John has sparked fresh health fears after appearing frail and struggling to walk as he enjoyed a sunny day on his mega yacht, RadarOnline.com can report.

The legendary singer has suffered with various health issues over the years, including knee and hip replacements, surgery for prostate cancer and most recently revealed he has limited vision in one eye following a severe eye infection. Article continues below advertisement

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John, 78, and his husband David Furnish , 62, were joined by friends Aaron Taylor-Johnson, 35, and his wife Sam, 58, for an afternoon expedition in France on his custom-built yacht.

The legendary singer kept things casual in a light blue button-dow

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