Liam Payne's girlfriend Kate Cassidy is said to be 'still in shock and disbelief' over the One Direction star's tragic death, nearly a month after he died

In the days before his untimely passing last month, Liam Payne was soaking up the sun on a holiday with his partner, Kate Cassidy. The pair were in Buenos Aires, Argentina, where Liam had recently seen his ex-bandmate Niall Horan perform live.

Liam Payne’s grieving girlfriend Kate Cassidy is giving more details about her decision to leave Argentina in the days before the singer plunged to his death — and she’s telling friends that she gave him an ultimatum to stop using drugs. “His drug use was causing a lot of drama,” said the friend, who speaks to the 25-year-old influencer regularly.

Liam Payne's girlfriend Kate Cassidy is said to be struggling to come to terms with the One Direction star's death as she leans on loved ones in the aftermath of the tragedy

Liam Payne's girlfriend Kate Cassidy left Argentina hours before the singer fell to his death and it has been claimed she issued him with an "ultimatum"

Liam Payne's girlfriend Kate Cassidy allegedly warned him to stop taking drugs or he would 'lose her' before she cut short their holiday to Argentina, returning home 48 hours before his death.

Former One Direction star Liam Payne was tragically found dead at his hotel in Argentia - and just 48 hours earlier, he was enjoying his romantic getaway with girlfriend Kate Cassidy before she decide

Liam Payne's girlfriend, Kate Cassidy, is still 'in shock and disbelief' following his unexpected death at 31 years old. A source tells ET that she’s trying her best to process the loss, leaning on loved ones,

Liam Payne's girlfriend Kate Cassidy had been in Argentina with him, but flew home a few days before the One Direction star tragically fell to his death from a hotel balcony

Late One Direction star Liam Payne was in a loving relationship with Kate Cassidy when he died a tragic death after falling from a hotel balcony.The 25-year-old social media celebrity and

Liam Payne's relationship with Kate Cassidy was reportedly put to the test over his alleged drug use. Sources say Cassidy gave the singer a "tough love" ultimatum to fix up or lose her, but he chose the drugs,