Happy Together is the first greatest hits album released by Twins. It was first released in November 2002 and consisted of 3 CDs (4 new songs and 20 selection hits) and 1 VCD,along with 10 different covers. There's a third version of this greatest hits with added new music videos and 2 brand-new covers released later,and it breaks their album record which have total 13 covers for an album to date.