 After that Gounaki coached, arranged and produced the vocals of Sandra Nasic, singer of the band Guano Apes for "Don't Give Me Names" and "Walking on a Thin Line" and was their steady tour coach and friend during their worldwide tours ( 1998–2002).In 2001, Gounaki became the vocal coach of the German TV show Popstars.Her work helped the winning band Bro'Sis selling over 1,500,000 copies of their debut album "Never Forget" within three days.