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LAS VEGAS, NV - DECEMBER 14: Singer Debbie Gibson performs during the Mondays Dark 2nd anniversary at The Joint inside the Hard Rock Hotel & Casino on December 14, 2015 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/WireImage)

LAS VEGAS, NV - DECEMBER 14:  Singer Debbie Gibson performs during the Mondays Dark 2nd anniversary at The Joint inside the Hard Rock Hotel & Casino on December 14, 2015 in Las Vegas, Nevada.  (Photo by Gabe Ginsberg/WireImage)