Girl's Day's Hyeri poked fun at her best friend BLACKPINK's Jisoo. 

On January 5th, Hyeri posted the first video of her own YouTube talk show on her channel. Jisoo appeared as a guest to support her best friend's new endeavor, and the two showed off their friendship by poking fun at each other. 

Hyeri commented, "Jisoo and I go to the same hair salon, pilates, dermatologist, aesthetician, scalp care place. Why are you copying me?" Jisoo then commented, "I'm actually a stalker of Hyeri. She tries everything and picks the best one. Then I take note of it and copy it," which made everyone laugh.

They also revealed how they became best friends. Jisoo said, "It was when we appeared in 'Amazing Saturday.' But the first time I saw her, she was a senior, so I got good advice on the entertainment industry," and Hyeri recalled, "Was that Jisoo's second year?"

Hyeri also revealed, "She also bought her car after me," and Jisoo said, "When I first rode her car, I thought, 'I wish I had a car like this. It's easy to drive. If I buy a car, I should buy a car like this,' and later, I bought the same car without realizing it. I was relieved when Hyeri said, 'This is the car I used to drive,''" causing laughter.

Check out the full talk show video above.