The Underdog Project
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The Underdog Project is a German dance music group which launched its first album, It Doesn't Matter in 2001. Their hits include "Saturday" (not to be confused with "Saturday Night"; this was not released until two years after the album had come out), "Summer Jam" and "Tonight". The band has four members: Vic Krishna (vocals), Craig Smart (vocals), DJ Frank (remixes) and AJ Duncan (keyboards).
source: Wikipedia