Carrie Underwood The American Idol winner and Grammy Award–winning country singer quit eating red meat after watching her parents castrate a cow, according to Taste of Country. These days, she sticks to a mostly vegan diet.e60dc2a1-f33c-4a05-9b50-8e3e8e5976292fdece9c-c186-4b89-821c-986b3e22a722 “I want to be vegan so badly, all the way, 1,000 percent,” she said in an article in Self . “But traveling and stuff, it just kind of gets hard. Someti…