The 25-year-old “Dancing With the Stars” champ uttered the racial slur with a giant smile while singing DaBaby’s “Rockstar” on an Instagram live story for her 2.8 million followers Saturday.

“I did? I’m so sorry,” the former “Bachelorette” said in follow-up clips, still smiling and even giggling.

The slur soon sparked escalating outrage among Bachelor Nation — with some of the reality TV star’s castmates angrily demanding a full apology.

“How are people still gonna defend CELEBS with access to SOOO much privilege, knowledge, and education saying the N-word,” fellow former “Bachelor” star Bekah Martinez wrote in a lengthy tirade in her stories.

Martinez, 25, noted that Brown used the slur even though she “had the wherewithal to skip over the F-word lyrics first.”

“At least make a legitimate apology and acknowledge your behavior,” she insisted, following up with several video clips discussing the scandal.

Brown finally issued a full mea culpa late Sunday.

“I owe you all a major apology,” she wrote in an Instagram story.

“There is no excuse and I will not justify what I said. I have read your messages and seen the hurt I have caused. I own it all.

“I am terribly sorry and know that whether in public or private, this language is unacceptable. I promise to do better.”

At least one former Bachelorette star came to her defense — rumored ex Tyler Cameron.

“HB is not racist. I know,” he insisted in his stories. “We need to lift HB up from this. She is learning and growing just like every single one of us.”