Justin Timberlake, Mariah Carey and Halsey are among the celebrities to have come out in support of Britney Spears after her court testimony.

On Wednesday, the singer told a Los Angeles judge being under an “abusive” conservatorship left her “traumatised”.

The arrangement prevents Spears from controlling many aspects of her life.

“After what we saw today, we should all be supporting Britney at this time,” said Timberlake, who dated Spears two decades ago.

“Regardless of our past, good and bad, and no matter how long ago it was… what’s happening to her is just not right. No woman should ever be restricted from making decisions about her own body.”

Meanwhile, pop star Halsey tweeted: “Bless Britney and I hope with my whole heart she is awarded freedom from this abusive system.

Other singers offering support to Spears included Brandy, who said she was “sending all [her] love and support to Britney Spears and her fans”, and Mariah Carey, who tweeted: “We love you Britney!!! Stay strong.”

Britney’s father Jamie Spears was granted control over her affairs by court order in 2008.

The order was granted after the star was put in hospital amid concerns over her mental health.