Singer Simone Battle has died aged just 25, it was confirmed today.

Simone was part of US girlband G.R.L. who had their first UK and Ireland hit this week with Ugly Heart.

News of the star's death first came to light when her close friend Derek Butler posted a touching tribute on his Instagram account.

He uploaded a picture of Simone with the caption, "I'm still in shock and in disbelief to have confirmed the death of my childhood friend @SimoneBattle. Her heart was pure gold and her star power limitless. Rest in sweet peace Angel."

Simone's passing was later confirmed by G.R.L's label, RCA Records.

No cause of death has been announced at this stage.