4minute and SISTAR were the special guests on the August 21 installment of MBC's 'Stargazing.' �

On this day, 4minute's Gayoon revealed that she was considering gaining some weight. She said, "I had quite a lot of popularity in Brazil when I was plump. �However, after losing weight, that popularity dissipated. �I think I'm going to need to gain weight again," making everyone laugh.

SEE ALSO: Renowned yoga instructor Lee Yoo Joo, from 'Infinite Challenge' passes away at 35

In addition, HyunA was asked about her relationship with her Trouble Maker partner, Hyunseung by a fan. �She said, "I don't think there's anything to say in response."

After hearing that response, the fan named Robbie, explained that there was a lot of skin ship in their performances, but her response was making him feel less certain about it.

HyunA also tries to teach her "Red" dance moves to Christina, which you can check out below at about 1:20.