The Kardashians and dark hair go together like bread and butter, or so we thought until we spotted eldest sister Kourtney Kardashian with a bleach blonde bob.The 44-year-old, who gave birth to her fourth child and the first with her husband Travis Barker last year, poses up a storm with the light hair colour on her Instagram grid in a series of snaps she titles 'Hi from lost blondie files'. It's unclear if she's simply reminiscing about her time as a blonde last year or if she's gone back to bleach since giving birth to Rocky, 4 months.