Rihanna spent the last couple of days shouldering internet outrage.

People across Twitter claimed the pop superstar appropriated Islamic culture when she included a Hadith in the background of a musical performance during the annual fashion show for her lingerie line, Savage X Fenty.

A Hadith, as defined by Oxford Islamic Studies Online, is an extremely sacred element of the Islamic faith:

"Report of the words and deeds of Muhammad and other early Muslims; considered an authoritative source of revelation, second only to the Quran (sometimes referred to as sayings of the Prophet)."

At Rihanna's Savage X Fenty show, an audio reading of a Hadith about judgment day was used as the backing narration during singer Coucou Chloe's performance of her song "Doom."

Others also expressed anger or upset over the choice.

Some people called attention to the fact this was not an isolated incident for Rihanna.

Some people recalled a 2013 moment when Rihanna was accused of appropriating Islamic culture during a photo op when she wore a hijab in front of the Sheikh Zayed Grand mosque in Abu Dhabi.

Rihanna was asked to leave the mosque.

Given all the backlash since the Sunday night event, Rihanna addressed the incident and apologized in an Instagram story.

@badgirlriri/Instagram

In addition, Rihanna apologized directly to a fan who raised their concerns in a direct message to the singer.

She responded directly back with a long message that, once screencapped, made the rounds on Twitter.

@badgirlriri/Instagram

Coucou Chloe also apologized for her part in the performance with a pair of Twitter posts.

Rihanna's apology was accepted by some and deemed insincerely reactionary by others.

Hopefully future Rihanna-produced show content will be researched before it hits the stage.