'Monster rookie' Son Seung Yeon transformed into a disco goddess on the January 17 edition of 'Immortal Song 2'.

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For the 'family special' of the show, the singer covered the Sook Sisters' 1979 song "Becoming One Bird". As it's one of South Korea's most recognizable disco tracks, Son Seung Yeon had a lot to live up to. To no one's surprise, her refreshing vocals complemented the song well. 

In the studio, Lee Sae Joon commented, "This is the future of 'Immortal Song'. I have no words. She's a vocalist that could succeed anywhere."

Though she did beat Seo Ji Ahn, Hong Kyung Min took the final win.