For his fifth album, Eun selected 20 of over 100 songs. In 2007, he performed at the DKNY Party. Eun appeared on Starship Entertainment label-mate Moon Ji-eun's debut EP (released on April 10, 2008), rapping on "Fox" and appearing in its music video after Moon appeared in Eun's 2003 music video for "Suddenly" (문득). In June 2008, Eun collaborated with J-Walk on a song for J-Walk's album, "My Love". Later that year Eun released "G Code"; its single was "Dangerous", a sample of Kardinal Offishall featuring Akon's version of "Dangerous".