Kylie Jenner has gone back to blue with her new hair style, ditching her usual dark locks for turquoise tresses at the Bellami Beauty Bar launch in West Hollywood last night (July 9).

The 17-year old, who has dyed her locks the icy colour before, completed her look with a plunging white catsuit, showing off her impressive cleavage.

Kylie first debuted her blue hair on Instagram, with big sister Kendall Jenner also posting a snap, along with the caption: “babe, you're blue.”

Before you jump to conclusions that Kylie’s new hair colour is a nod to the current drama with beau Tyga, it’s more than likely that the switch up was to promote her new line of hair extensions with Bellami, which come in a variety of different colours.

As well as her blue hair, the reality TV star'schest also caused a stir at the event, with Jenner recently denying reports that she’d had a boob job on SnapChat, stating: “To whoever thinks I had breast implants, there’s a whole lot of tape in here holding these up.”

That (kind of) settles that one then…