Even stars can have celebrity doppelgängers.
The slip-up took place after a social media user, Noha Hamid, spotted the Legally Blonde star while eating at a barbecue place in Nashville.
"I swear, I see this, like, lady with her husband and kid, and I'm like, 'That looks just like a celebrity,'" Hamid said in a TikTok video. "And I'm trying to think who, and I'm like, 'Oh, Carrie Underwood?'"
Hamid couldn't fully see the celebrity because the A-lister was wearing a "big cowboy hat" and a mask. So, Hamid decided to solve the mystery and approached the celeb.
"I wait until she kind of goes back to her car so I can, like, ask her if it's her—not in front of everyone to blow her cover," Hamid said. "Then she's like, 'Hey! Oh no, I'm not Carrie Underwood. But have a great day.'"
Initially, Hamid thought the star was lying. It wasn't until later that she realized she had been talking to Witherspoon. The Oscar winner seemed to get a kick out of the mistake, too.
"To the woman in the parking lot who just asked me if I was Carrie Underwood: You officially made my day!" Witherspoon tweeted.
Underwood did, too.
"YOUR day?!?!?!?!" the Grammy winner replied. "That lady just made my whole life!"
Underwood and Witherspoon aren't the only stars to be mistaken for one another. To see celebrity look-alikes, check out the gallery.
For more, click here.