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With the usual M Countdown episode replaced by a best of 2015 (so far) special, no one was expecting a number 1 to be announced -- especially Sistar!
Voting for the top spot continued as normal, despite the usual show not airing, and the gorgeous four took the top spot with their summer comeback smash, "Shake it."
With no stage to present the prize on, producers for M Countdown decided to surprise the group by asking them to film an intro video and a few other clips for the show.
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What they didn't know is that it was actually to announce their reign of the top spot in the popular music show's weekly chart.
Check out Hyorin, Bora and Dasom and Soyou's faces when the production team tell them the winning track is "Shake it!"