Melissa Gilbert, the former 'Half Pint' star, is trending not for a new movie, but for accidentally becoming the internet's latest 'icon of irony' after a clip of her passionately defending the nostalgic perfection of 'real' butter over margarine went viral—only for a meme historian to point out that her 'Little House on the Prairie' character famously survived on lard and moral lessons, making her a hilarious poster child for an era that didn't have a grocery aisle to argue about.