Chaostheorie is the second album of the band Revolverheld.
Jandová provides additional vocals on the song "Undivided" from Dog Eat Dog's 2006 release, Walk With Me, "Horizont" from In Extremo's album Mein Rasend Herz, "Wie weit/How far" from Apocalyptica's self-titled album and the 2010 single "Halt dich an mir fest" with Revolverheld from the album In Farbe.
Even though he worked with well-known artists, he always had an eye on promising newcomers, thus he promoted the Russian-born R&B- and pop-singer Inessa and the band Manga which eventually became Revolverheld.