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Singer Billie Eilish is nutty for Costco peanut butter. Elliott Cowand Jr / Shutterstock.com
There are many reasons to shop at Costco, from the free hearing tests to the flaky croissants and the $1.50 hot dog and refillable soda combo. In fact, even some wealthy and well-known people who don’t need to pinch pennies have been spotted shopping at the cavernous membership-only warehouse stores. Even Kardashian matriarch Kris Jenner once declared, “My favorite store is Costco.