K-pop is one of South Korea's most famous exports, but when new NBC reality show Better Late Than Never filmed an episode in the country, its famous stars took a deep dive into the world of Korean pop with some of its biggest stars.

William Shatner, George Foreman, Henry Winkler, Jeff Dye and Terry Bradshaw star on Better Late Than Never—which is actually a U.S. adaptation of the Korean series Grandpas Over Flowers—where they backpack through Asia and check off experiences on their bucket lists. In the latest episode, the guys meet with K-pop phenoms Girls' Generation, one of the most massive acts in Asia, to get some training for a music video.

Watch above (starts at about 5 minutes in) as GG members Tiffany, Yuri, Hyoyeon and Sunny bust a few moves with the guys at their SM Entertainment label headquarters and film on a set very similar to their classic "Gee" music video (below), that boasts more than a 165 million views on YouTube.

Watch the full episode above for more with Girls' Generation and the guys traveling through Korea. Then find out which member of the girl group should be your BFF with our quiz right here.

Listen to the latest episode of Fuse's K-pop podcast K-Stop below: