There was a time when celebs — Cassie, Alice Dellal, Ellie Goulding — couldn't get enough of the whole shaved side-of-head look (perfect for showcasing piercings), but that was sooo last summer. So what's the 2014 version? This morning we woke up to see hair trendsetter Kylie Jenner (green hurr, anyone?) has Instagrammed her latest extreme 'do: a shaved undercut. To buzz or not to buzz? Discuss.