Ozzy Osbourne looks frail as he is pushed in a wheelchair

was pictured leaving an office building in a wheelchair in Santa Monica, , on Tuesday afternoon.

The frail-looking star, 74, who was diagnosed with Parkinson's Disease in 2003, was wearing a face mask wile being pushed along in the wheelchair by two companions.

Ozzy was sporting a black T-shirt with a pair of sweatpants, while he covered his knees with a blue blanket to keep warm.

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