Fundraisers popping up online in honor of slain internet star Bianca Devins — whose gruesome murder was chronicled on Instagram by her alleged killer — are all fake, a spokesman for her family said Tuesday.

Internet trolls are claiming to raise cash to help the upstate teen’s heartbroken relatives, the spokesman said, adding her family hasn’t approved any official fundraisers.

“Unfortunately, there are some fundraising sites that have been put up on the internet purporting to be raising funds for Bianca and these are not legitimate sites,” Devins’ family said in a statement.

“The family of Bianca Devins would like to inform the public that our family has not, at this time, authorized or set up internet or other fundraising or donation sites for Bianca or in Bianca’s name.”

Instead, her relatives plan to set up a scholarship donation website in Devins’ name for students in her hometown of Utica, according to the statement.

On Sunday, Brandon Andrew Clark, 21, allegedly killed Devins, 17, and posted a gory photo of her with a slit throat on the social media site on his account, @yesjuliet. Alongside the pic, which was left on Instagram for hours, he wrote the message “sorry,” according to police and reports.

When confronted by cops, Clark allegedly cut his own throat, took a selfie and posted it on social media.

He was rushed to a hospital and charged Monday with second-degree murder.

– Additional reporting by Zachary Kussin