Dolly Parton's "9 to 5" is still one of the most iconic country songs of all time, and now some of Parton's closest friends and biggest fans are paying props to that classic track on A&E's upcoming Biography: Dolly. 

“A song like ‘9 to 5,’ everyone could relate to,” Lady Antebellum frontwoman Hillary Scott says in a preview. “From a woman’s standpoint, a lot of those lyrics are hitting on some hot buttons that we’re still talking about today.” 

Adds bandmate Charles Kelley, "She gave country music a wider audience; she made it even more popular.”

Meanwhile, Parton's 9 to 5 co-star Lily Tomlin adds about her role in the hit movie of the same name, “She was a big musical star and now a movie audience, with a huge hit as 9 to 5 was, just makes her better. A queen, an empress." 

Biography: Dolly premieres Sunday, April 12, at 8 p.m. ET.