SISTAR's Bora posted a photo on her Instagram with the other three members. The girls held a sign that fans had made for them for their concert together with MAMAMOO. The slogans read, "We'll remember you SISTAR". The caption reads, "Thank you so much. #SISTAR#We'llRememberYouSISTAR".

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A post shared by BoRa(@borabora_sugar) on May 28, 2017 at 3:35am PDT

SISTAR will release their last track as a group 'Lonely' on May 31 and start their one-week promotion on�Mnet's�'M Countdown' on June 1.�

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Be sure to catch the last of their promotions as a full group.