EastEnders star Shona McGarty looked worlds away from her character Whitney Dean on Sunday as she unveiled a new blonde hair transformation.The actress, 30, took to Instagram to show off her Britney Spears inspired makeover where she wore a costume from the pop star's hit music video Toxic. Posting a collection of selfies, the actress donned blonde hair with long extensions, piercing blue eye shadow and a cabin crew costume complete with matching hat.