Melania may have featured some hits from the Rolling Stones and Michael Jackson, but according to producer Marc Beckman, some big-time artists denied permission for their music to be used in the documentary.

Beckman, who also serves as an advisor to the first lady, spoke with Variety about the music that was most difficult to license, citing instances where “there was music that [they] tried to get, but sadly, there were politics to it.”

“For example, the guys from Guns N’ Roses split down the middle politically,” he explained. “There was a beautiful song we wanted to use, and one of the guys — I don’t want to name, it’s not fair —said, ‘You got it. Go.’ And the other one was basically like, ‘There’s just no way.’ We needed everybody’s approval to get it in the film. So Guns N’ Roses was definitely a disappointment for us; we all have a lot of respect for Guns N’ Roses.”

Beckman mentioned that they also wanted to use a song from Grace Jones, who he said they have “a tremendous amount of respect for” as well.

“She apparently couldn’t get over the political hurdle, notwithstanding the fact that the film is not a political film,” he shared. “So that was disappointing, too. It’s disappointing when people put politics so far ahead, and that happened a little bit with the film, for sure.”

DECIDER reached out to representatives for Guns N’ Roses and Jones, but did not hear back by time of publication.

According to Beckman, they also were unable to secure rights to Prince‘s music, claiming that they were “ready to go” before the lawyer managing the late artist’s estate “was like, ‘Prince would never want his song associated with Donald Trump.’”

“And we’re like, ‘But it’s not a Donald Trump film! He comes into the movie once in a while, but this is all about Melania. It’s not political.’ And that guy blocked it. It’s so ridiculous,” Beckman told Variety.

The controversial documentary from director Brett Ratner did not receive the warmest of reviews from critics, including DECIDER’s own Jesse Hassenger, who deemed the film “a disingenuous documentary that misfires by mistaking the First Lady’s fame for star power.”

As for when the documentary, which was distributed by Amazon MGM Studios, may arrive on Prime Video, Beckman said that they are “still working out the date with Amazon as far as the launch goes.”

“We’re pretty much almost done with it on the post-production side now,” he added. “I think, conservatively predicting, mid-summer we’ll launch. We haven’t definitively picked a date yet, but it should be around then.”