Fifth Harmony's Normani Kordei says she is taking a break from Twitter following racist abuse.
It comes after what she calls "unjust hate" from her own fans.
In an interview last week Normani hesitated when she was asked to find something she liked about fellow band member Camila Cabello, and since then has faced trolls.
She has tweeted a letter to her fans saying she "can't subject herself any longer to the hate".
The 20-year-old wrote: "I've never been one to deny anyone of their opinions, but over the course of this last week and especially over the last 48 hours, I've not just been cyber bullied I've been racially bullied."
She calls tweets and pictures aimed at her "horrific".
The post was met with sympathetic replies.
Becky G wrote: "You're so strong. You're right, love does go farther than hate in this. If only everyone saw it that way. Much love xo."
"Ignore the hate!" Suzette posted, "Your true fans, We adore you baby. Take the time you need. Focus on yourself! We respect! #WeLoveYouNormani"
And Nicole felt so strongly she upcapped her response: I CANT BELIEVE THIS IS HAPPENING, ITS TWENTY SIXTEEN AND PEOPLE STILL HATING PEOPLE BY THEIR COLORS
This is what Camila tweeted.
There've been rumours of a rift in the group with focus on Camila who is working on solo material.
Normani received the online abuse after describing Camila as "quirky" and "cute" without going into as much detail as she did about Ally, Lauren and Dinah.
Nineteen-year-old Camila has been working on solo material for a while and has already released music with Shawn Mendes.
The group are promoting their second album, but recently cancelled tour dates in the US to focus on their third album.
Normani ended her letter saying: "I'm not the first black female celebrity to deal with this and I'm sure I won't be the last.
"I want to take this moment to say love goes much further than hate in this world.
"Hiding behind a computer and putting people down, especially for the color of their skin, doesn't make you cool, it makes you a coward!"
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