On the next Invincible Youth, the G7 girls invited their close star friends over to their "open-house" filming. Kim Shin Young unsurprisingly left the G7 girls in stitches after using honorifics during a phone call with Super Junior's Heechul, even though they're good friends and the same age. Heechul joked around by using different voices and referring to Kim Shin Young as a "cold-hearted woman." The main event was when Heechul created waves of laughter after saying to SNSD's Sunny, "You still have a long way to go in reality shows." The episode will air on February 19.