First-generation K-pop group As One delivers a showstopping performance on The Seasons: Park Bo-gum's Cantabile

Veteran K-pop duo As One has just made their appearance on The Seasons: Park Bo-gum's Cantabile, returning to the stage after six years.

Debuting in 1999, As One is an R&B duo consisting of members Crystal and Min. For over 25 years, the two have been known for their smooth vocals and heartfelt ballads. Their recent surprise guest appearance on The Seasons: Park Bo-gum's Cantabile has demonstrated that after all this time, As One still has the stunning vocals and performance skills they're known for.

With As One's unexpected reappearance on the stage, many are now reminiscing about the group's heyday in the early 2000s, and admiring As One's still-perfect vocals.