Continuing the series of mistaken one hit wonder, this month, the Wonder  Why series looks at the hip-hop group Digital Underground.  Breaking  out in 1990 with the song "The Humpty Dance," it was easy to write off  Digital Underground as a gimmicky rap group.  However, upon looking  deeper, one finds the DU were carrying on a tradition started by funk  legends P-Funk.  The success of "The Humpty Dance" led to a unique  opportunity for the band as well as hoping launch the career of one of  the biggest rap stars of the nineties.  A minor hit would follow a  couple of years later.