Girls' Generation had the first performance of their world tour over the weekend, and fellow labelmate Eunhyuk was backstage with them to make sure everything went smoothly!

He tweeted photos with Seohyun and YoonA as well, writing, "My best friend Seohyun", and "Yoong yesterday". 

It looks like he was also watching them perform, because he also tweeted a photo of the stage, writing, "Girls' Generation, fighting. I'm watching you".

The EXO boys were also present at the concert to cheer their sunbaes on, and Girls' Generation must feel like they can take on the world with such great supporters!