Carrie Underwood
Underwood is one of the most successful country music stars ever. The Grammy Award-winner sold over 60 million records and earned millions of dollars. But none of this went to her head and she enjoys a down-to-earth existence. Underwood goes grocery shopping by herself and also clips coupons.

Meanwhile, the singer loves a sneaky subway trip when she wants a treat. Some people will scoff when they read this but she has a net worth of $140 million. Many celebrities allow their wealth to go to their heads and it changes them. Underwood has more money than she’ll ever use but she doesn’t live that way (via Women’s Health).