Joo Won revealed his love for A Pink on the latest episode of '1 Night 2 Days.'

The episode showed the flower-boy actor walking with fellow cast member Sung Si Kyung when talk turned to popular girl groups. Sung Si Kyung first confessed that he wanted to listen to A Pink's newest hit track, "No No No."

Joo Won had a counter-confession to make, replying, "I don't know if I should say this? I have all of A Pink's songs on my phone."

"When I watch A Pink, I think of S.E.S and Fin.K.L from the past," the actor continued. "It makes me feel good when I listen to them because there's a lot of lyrics telling you to cheer up."

The two stars briefly basked in their girl-group nostalgia by singing and dancing to Fin.K.L's "Eternal Love".

Check out the full episode below!

SEE ALSO: Apink to hold 1st solo concert in 4 years