With this song
This was the song that started the summer. Before this song, there isn't a thing called "summer comebacks" or "summer songs". Sistar was the one that started this trend of not just having a June/July comeback, but a "summer" comeback.
You ever wonder why no one really raves about spring/autumn/winter comeback? Because no one impacted a season as much as Sistar did. Sistar literally INVENTED SUMMER
Everyone thank the SUMMER QUEENS (this isn't a made up title it's an actual title SKoreans gave to them) for paving the way for summer comebacks