 In 2007, he started working with Gianna Nannini; first in studio and finally on stage.The Pia Come la Canto Io Tour was followed by over 60 concerts of the Giannabest Tour in 2008.During the Amiche per l'Abruzzo Concert on 21 June 2009 at the San Siro stadium in Milan, Stephan joined the stage with Gianna Nannini, Laura Pausini and others to benefit the victims of the earthquake in the Abruzzes.