MAMAMOO stunned the audience with their perfect vocals and dance on the January 10 installment of 'Immortal Song 2'.

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The girl group covered legendary singer Joo Hyun Mi's "Wait a Minute". MAMAMOO first caught the attention of the audience with a calm performance, focusing on their vocals, until they came out with an energetic dance. Their cover also included rap, and their harmonization wowed everyone.

The hosts in the waiting room only had praise for the rookie group, saying, "It's like four Ailee's," and "A female Ulala Session."

In the end, however, Kim Kyung Ho�took the final win.