Ariana's "Problem" soared to #1 on both the overall international digital chart & downloads charts with combined sales of 90,487 copies & 1,299,563 streams.
Thanks to this cover version by Girl's Day & Ailee:
What is wrong with their voices? They sound like alvin and the chipmunks on steroids
Are they even live?
MAMA is notorious to be a mess with the mics, so this year the girls records their vocals on studio and sang with the audio on. But Minah & Sojin have high pitch voice. And Hyeri can't sing (even the member of the group say it). Ailee sang higher than usual to match the girls.