B1A4 made noona fans lose their minds on the latest 'Immortal Song 2'.

Before the idol group performed their cover of '60s legend Seol Woon Do's "Older Sister", they stated, "We want to appeal to a large age range. I hope all the noonas in the country [like it]."

Seol Woon Do said, "These flower boys have absolutely killed all the noonas. I'm worried for Yoomi. I didn't expect 'Older Sister' to come out like this."

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However, Yoomi beat them that round with 395 points.

What do you think of their performance? Was it a "noona killer"?