Actress Amandla Stenberg called out "Keeping Up With The Kardashians" star Kylie Jenner for posting a photo on Instagram wearing cornrows, E! News reported. The "Hunger Games" actress accused Jenner of cultural appropriation, but singer Justin Bieber has Jenner's back.

"Guys leave her alone, we're all trying to figure it out and she happens to be under a microscope!" Bieber wrote, according to Us Weekly. "I'm the first to know this. But saying she's being racist because she wants her hair in braids is ridiculous. Let's focus on the bigger picture and instead of fighting over something stupid let's do something about equality, but it doesn't start here blasting a 17 year old kid for wearing braids [sic] smh." 

The comment appeared on Jenner's controversial Instagram post, as previously reported by HNGN. Jenner poses in a mirror selfie wearing baggy sweatpants and a fitted crop top with her hair in cornrows, a style of braiding that is a traditional African American hairstyle. She captioned the pic, "I woke up like [sic] disss," borrowing a lyric from Beyonce's song "Flawless."

But it's Stenberg's comment that started the feud between the famous teens, and Stenberg tagged her friend in the comment to show her Kylie's new 'do.

"When [sic] u appropriate black features and culture but fail to use [sic] ur position of power to help black Americans by directing attention towards [sic] ur wigs instead of police brutality or racism #whitegirlsdoitbetter," Stenberg commented.

"Mad if I do...mad if I don't. Go hang w Jaden or something," Jenner replied, referring to Jaden Smith, a mutual friend of both girls. Jenner reportedly dated Smith last year, and Smith recently took Stenberg to her high school prom, according to the Washington Post.

See the Instagram photo that started the feud below.

 I woke up like disss

A photo posted by King Kylie (@kyliejenner) on Jul 11, 2015 at 11:12am PDT