Adrian Winkler is a german singer/songwriter and music producer. He created a music production company with his partner Uli Fiedler called leider fett.

He´s a member of the group VOICE 4 U where he plays acoustic guitar and sings the background vocals. Tobias Ziegler and Adrian Winkler form a singer/songwriter duo and created their own band named Balloon (Bass: Uli Fiedler, Drums: Harry Alt).