We've all been secretly (or openly) waiting for this moment!
SEE ALSO: TWICE radiate their cute charm in the new teaser photos for 14th mini-album 'STRATEGY'
Everyone has been looking forward to seeing IOI finally debut and promote at the same time as TWICE, and the monumental event took place on the May 5th 'M! Countdown'!
After the show, IOI and TWICE got together back stage for a huge group photo, forming such a hearty group of beautiful young ladies, we can barely tell who's in which group! And it looks like IOI's Jung Chae Yeon is even holding up a 'PAGE TWO' album!
Now that we've seen it happen once, let's look forward to the next time the two girl groups come together! Also, make sure to follow IOI's official Instagram here!
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