For a styling tool that does it all, London-based hairstylist Jonny Eagland (he had a part to play in Charlize Theron's incredible bowl cut) recommends GHD Original Hair Straightener (£87). "This can help you to create a multitude of different waves and also give you that sharp, polished finish on your hair." His top tip is to bend the hair from side to side (almost like a finger wave) whilst clamping the iron at each bend to create a less voluminous, cooler finish that can be styled with or without product depending on how you prefer your hair. In addition to the GHD, "any Hot Tools iron will work magic on the hair," he added.