Simon Cowell's appearance raised concerns with fans ... the music mogul wore his signature 'uniform' of a grey knit sweater, black jeans, and orange-tinted glasses. Fans were quick to notice ...

Simon Cowell joked on Instagram about his son ... Eric sported a yellow shirt paired with denim jeans, while Simon donned stylish orange-tinted glasses paired with a sleek all-black fit.

The Syco boss wore a black puffer coat with black gloves and jeans. Keeping the ensemble ... first steps out following the ...