Nicki Minaj is used to calling the shots, but she’s had to make some adjustments since joining the judges’ panel on “American Idol.” While she’s made headlines for her feud with fellow judge Mariah Carey, it’s the show’s schedule that has proven to be the biggest challenge.

“I’m not really used to having to show up somewhere at a specific time,” Nicki tells “E! News.” “I kinda been my own boss for a few years, so this is like adding discipline back in my life. This is adding that strict regime of having to do something. Everybody’s affected by what I do.”

She also shares advice for her Barbz.

“Don’t be lazy. Push yourself even when you feel like you can’t go on.”

The conclusion to her E! reality series, “Nicki Minaj: My Truth,” airs Sunday at 10:30 p.m. She will also perform at the American Music Awards the same night.