SISTAR talked about their recent sixth anniversary during June 21 showcase for their new mini-album. The group had debuted back on June 3, 2010 with "Push Push," so their sixth anniversary passed recently.
The group said, "We excitedly hung out while practicing, eating, and chatting. Just the four of us had a party. Seeing as how we were rehearsing last year, we practiced with the staff members and went bowling, but this year, just the members ate a lot of yummy food and played."
Sounds nice! A belated congratulations.