Demi Lovato lashes out at fan who called her team 'rotten'

Demi Lovato has lashed out at a fan who criticised her team and said they only care about the singer's money.

"It was completely unfair to fire Dani, she's one of the few who really cares about Demi's health and has been helping her for three years," the tweet from a Demi fan account read.

"She's surrounded by people who only care about her money and she does not see it."

The tweet was then shared on Instagram, along with the caption "the Demi team is so rotten and she does not realise it, needs a total change."

Lovato promptly replied in the comments section, as seen in a screen grab obtained by People magazine.

"You have no idea what you're talking about," the 'Cool For The Summer' hitmaker wrote.

"True friends don't do interviews about you when you OD."

Speculation about the team member in question initially pointed to her former back-up dancer Dani Vitale, however Lovato clarified that was not who she was talking about.

The 26-year-old may instead be referring to Danielle Martin, her former trainer, who recently told Radar Online she lost her job for "speaking up" for the pop star.

"Pretty sad. I did nothing but empower her. Nothing bad to say."

Lovato was discovered unconscious at her Hollywood Hills home in July, before being revived with Narcan - a treatment for opioid overdoses.

She was then rushed to Cedars-Sinai Medical Center where she stayed for several weeks before checking into a rehab facility.