Gabrielle Union's Firing From 'America's Got Talent' Is Now Under Investigation

The guest judge also made the joke in the presence of Gabrielle Union and Julianne Hough, whose recent exits as judges shed light on the show's alleged "toxic culture".

"We take issues of workplace health and safety very seriously". A day later, a report by Variety claimed that while working on the show, Union had expressed concerns over racially insensitive situations during her time as a judge, including a joke Leno allegedly made during a stint as a guest judge that was later edited out of the episode.

'He sets it up that the men stay, no matter how ugly they are, no matter how old they are, no matter how fat they are, no matter how talentless they are, ' Stern said.

"How is it that Simon Cowell has orchestrated this?"

He went on, saying how "obvious" it was that the show regularly dismissed their female hosts in order to bring in 'hotter chicks and younger chicks'.

NBC, Syco Entertainment, Fremantle said in a statement to Peopleover the weekend they are working with Union to "hear more about her concerns".

"We are working with Ms. Union through her representatives to hear more about her concerns, following which we will take whatever next steps may be appropriate", the message continued.

Your thoughts on Stern's scathing comments about Cowell?

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On Sunday, Union retweeted a post from freelance writer Joelle Monique which listed steps on the proper way to apologize.

On Sunday, Union quoted a tweet that outline the three steps in "a solid apology". Sincerely admit wrong doing directly to the offended party. 2.

A separate report by Vulture pointed to workplace tension between Union and Simon Cowell, a judge and an executive producer on the series, in part, over Cowell's habit of smoking on set, which is illegal in California.

Additionally, sources claimed to the outlet that Union received specific critical network notes on her hairstyles, which were allegedly deemed "too black" for the "AGT" audience, and that she received these notes numerous times.

The tweet also noted that anything less than the aforementioned is just an attempt at "covering your own ass".

It was recently announced that the actress, along with fellow "AGT" judge Julianne Hough, would not be returning for the second season of "America's Got Talent: The Champions", which premieres January 6.

But Union was considered a problem, according to Variety, because she repeatedly addressed the "toxic" culture that permeated the atmosphere on and off the set of AGT, which she said included sexism, racism and questionable jokes.

The "LA Finest" and "Being Mary Jane" star is emotionally worn out after not having her contract renewed, despite being the most popular judge on AGT, by far.