JYP Entertainment released a video online yesterday of 2PM announcing their comeback and a 'love letter' to their fans.

The video showed all 6 members together thanking their fans for waiting 2 years for their comeback. They also talked about their new album, Grown, and the effort they put in together to make this album complete.

Members Junho and Jun.K wrote several songs in the album while others helped with lyrics and rap.

They also talked about their new title song ,"Comeback When You Hear this Song" and how this song was about their fans and how they wanted all their fans to come back to them.

They also revealed that they will be holding a 2PM comeback show that will be broadcasted as well.