"I love oils and serums, so the Andrew Fitzsimons Luxe Hair Oil (£3.50) was my one of favourite products to create," said Fitzsimons. "It took the longest and was the very last formula I made, only because I really wanted to get it right and to feel as luxurious as the most expensive serum on the market, which I think we achieved." You can run it through damp hair, prestyling, to both hydrate and reduce frizz; and once dry, you can run it through the ends or face-framing layers to add shine, or, you can use lots of it to create a wet-looking style, which Fitzsimons does quite a bit on the Kardashian women.