2PM's Jun.K composed his label-hoobae's Japanese song "So Lucky", and he came to their recording studio to give them advice and check up on their recording session! He gave each of them pointers on how to sing each part, and gave them praises after praises.

He also showed his love for his hoobaes by giving each and every one of them a tight hug after they finished recording their parts, telling them all they'd done an amazing job. 

Check out the video above!

Tip: kathy