Who was the creator of " Glad Day ? '
The music video for " I 'm Glad " was directed by David LaChapelle and it pays homage to Adrian Lyne 's 1983 film " Flashdance " , with the same story of an aspiring young dancer who welds by day and gyrates by night in a friendly neighborhood girlie bar , showing Lopez in a series of vignettes lifted from the movie , even borrowing its characteristically 80’s mote - softened lighting .