It's no secret that Britney Spears has a tricky relationship with her younger sister Jamie Lynn Spears, but fans were quick to spot what they believe was a subtle swipe from the former popstar regarding her sibling's upcoming jungle stint.Taking to Instagram, Britney, 41, shared a cryptic post just minutes after the news broke to the world that her sister would be heading to the Australian jungle for the newest series of ITV's I'm a Celebrity Get Me Out Of Here. She posted a quote, originally said by Ernest Hemingway, which said: "All things truly wicked start from innocence," followed by a pink flower emoji.