9 to 5 is that gloriously 80s comedy about office sexism and women getting even. Dolly Parton sang the titular song and starred in the film with Jane Fonda and Lily Tomlin. It was so the definitive film for women's rights and fighting "the man" against misogyny. It was like the sassy anti-Neil LaBute of its time.

But like all good things in the 80s, 9 to 5 went through a horribly corruptible nostaliafying process when someone figured that theater ticket sales needed a kitsch boost. Voila, 9 to 5: The Musical. And even though Dolly wrote the songs for the production, neither she nor Tomlin nor Fonda were performing in the stage version. That is, until some set hijinx forced the busty songstress onto the stage for an impromptu sing-along:

Don't make me have to sing," Parton boomed from her seat. "If I have to this time, I'll make Lily [Tomlin] and Jane [Fonda] do it with me." (Yes, her movie costars were there for opening night!)

An usher handed Parton a microphone and before you knew it, she was leading the audience in a "9 to 5" sing-along. "Thank you for being so kind and understanding," Parton said. "I'm glad I'm such a show-off." (She actually had to do the same almost two weeks ago when the set broke down during previews.)

If the set keeps "malfunctioning" than the show might actually succeed due to Parton's cameos. Maybe it's actually part of the act, as a metaphor.