It has already been seven years since 2PM's debut.

This is their third big wave.

The first wave was when they won the KBS Best Song Awards with "Again and Again." They earned the title "Beastly Idols" and continued on their success with "I Hate You."

Afterward, 2PM experienced a second wave with their hit song and video for "Heartbeat." The return to the top was also marked by member Jay Park leaving the group. They won the  'Artist of the Year' at the Mnet Asian Music Awards (MAMA), and fully made their way to the top.

Although many of their other albums and songs were hits from then until now, their third official album GO CRAZY will be the next big wave for 2PM.

They completely took off their image as idols and showed how they have fun on stage with their new motorcycle dance, crazy arm dance, and drinking lyrics.

2PM is showing a completely grown and upgraded skillset for this album. Member Jun.K wrote and produced the title song himself, and other members, including Chansung, wrote songs for the new album.

The biggest step for the popular boy band was growing out of JYP (Jin Young Park), the head of their agency, who has always written the title songs for their comeback albums.

The group has performed concerts and released albums in Japan and across Asia, but Go Crazy marks 2PM's official return to the Korean stage.  The members appear ready to show how much they've grown individually and as a group, but most importantly as artists.

They will also begin a world tour starting in Seoul on October 3.