Photograph by Jeremy on Flickr   Photograph by Jeremy on Flickr There have been a few big style statements this week with several A list celebrities changing up their hair style. We take a look at the best switch ups to provide you with inspiration for your own hair makeover this autumn.   Blake Lively's Short Bob Blake Lively debuted a cool new look this week in New York. The actress showed off a classic retro bob cut which is a major departure from her signature relaxed beachy waves look. Blake has been well known for her long blonde hair since she first played character Serena on hit show Gossip Girl, but this new shorter cut gives her a more sophisticated look that could be here to stay.    

Michelle Obama's Curled Side Ponytail

Michelle Obama attended a White House dinner with a new style - a curled ponytail tied to the side. The side swept ponytail looked beautiful and the part up-do made the style look formal but playful at the same time. To achieve a similar look start by creating a side parting then curl your hair with a curling iron. Next add some shine spray like Neal & Wolf's Glow, a weightless spray that adds deep, lasting shine to capture a glossy finish similar to the style as worn by Michelle. To finish the look twist the parted side of the hair under and pin in place to create the half up, low ponytail effect.   Ariana Grande's Colour Change up Ariana Grande has shown off one of the more dramatic hair style changes this week with a new platinum blonde colour. The striking shade is a big change from her usual chocolate brown locks but it is a style that really works for her. Of course we are used to seeing various colour changes from Ariana, including her red head phase, but the new platinum blonde colour is the most striking yet. The look was first seen on October 13th when a photograph promoting her upcoming album was released on Instagram.