5 millionaires and billionaires who still use coupons

Some of the world's wealthiest people are still cost-conscious. Perhaps that's why they're so rich in the first place.

Here are five millionaire and billionaires who, despite their wealth, still use coupons:

The pop star has built a fortune of approximately $275 million, but she still values a good deal, which is why she uses coupons at the grocery store and likes to bargain when shopping for clothes.

As Gaga tweeted in 2012, "I'm from New York! Where's the sale rack?"

Even the world's richest men have been spotted using coupons.

In Bill and Melinda Gates' 2017 annual letter, Bill recalls when Buffett took him out for a particularly economical lunch years ago: "Remember the laugh we had when we traveled together to Hong Kong and decided to get lunch at McDonald's? You offered to pay, dug into your pocket, and pulled out … coupons!"

The personal finance expert appreciates the smallest of savings "even to this day," she tells CNBC Make It, adding, "and I am a seriously wealthy woman."

She continues: "We get such joy when we go to the grocery store, and KT [Kathy Travis] comes out and she says, 'Look, because I have this coupon, we saved $2.50.' And we high five each other, because you should always get enjoyment out of it."

The basketball star told CBS Denver that people look at him "with shock" when he whips out coupons in the grocery store.

"I go to the supermarket, make sure I get the newspaper and tear the coupons out, save a dollar or two," said Anthony, who is worth about $90 million. "I'm human too."

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