“And I Am Telling You I’m Not Going” in her Tony-winning role as Effie White in “Dreamgirls,” Jennifer Holliday is still here, folks.But now her signature number has a completely different meaning for the 62-year-old diva, who has overcome weight struggles, career setbacks and a multiple sclerosis diagnosis in 1999.“When I first sang it, I was 19 going on 20 years old,” Holliday told The Post. “And as I became a young woman and then a real woman and then a grown-ass woman, the song took on different meanings. It’s a song of survival today.
