But Fashion Police presenter Kelly Osbourne looked like she needed to practise what she preaches when she was spotted in Los Angeles yesterday.
The 27-year-old wore a monochrome schoolgirl inspired outfit which should have made for a sweet look, but appeared unflattering on the star
She tucked a white T-shirt into a black pleated miniskirt and threw a black jacket over the top.
Kelly then overdid the accessories with two-tone brogues, a chunky silver belt and a large silver cross around her neck.
She added a thick patent black headband into her lavender locks and slipped on some aviator sunglasses to complete her look.
The star was seen arriving at her West Hollywood home after spending the day visiting her brother Jack, 26.
Kelly’s younger brother is expecting his first child with fiancée Lisa Stelly.
And Kelly appeared excited about becoming an aunt as she made her way into Jack’s home.
The former reality star sparked rumours she is hoping to make a return to music earlier this week when she posted a telling tweet.
Kelly uploaded a video of her single One Word to her Twitter page.
It was accompanied by the message: ‘Not seen this in a long time but it makes me realize i want 2 do music again this did not get the credit it desereved! [sic]’