SEE ALSO: Highlight reclaims their name and releases music as BEAST (B2ST) after 9 years

'Music Bank' tweeted on the 26th, "Girl's Day & AOA & BESTie! The top girl groups that have gathered together for the special stage! What do their hand motions in the photo mean? It will be revealed on on 6/27 (Fri) at 6:30 PM KST!"

While fans were busy guessing, a report has come out to reveal that the three girl groups will cover Girls' Generation's chart-topping title track "Mr.Mr" on the upcoming broadcast! 'Music Bank' has also hinted at a special stage coming from BTS as well, and you can bet there's more in store as this is a half-year special episode.

Stay tuned for EXO-K, B2ST, INFINITE, K.Will, A Pink, Girl's Day, SoyuXJungGiGo, IU, BESTie, BTS, MAMAMOO, B.A.P, VIXX, Untouchable, Jung Joon Young, Boyfriend, and AOA's performances and special stages on 'Music Bank' today!