Demi Lovato's ex-boyfriend Wilmer Valderrama "hasn't left her side" since she was rushed to hospital following a suspected overdose earlier this week.

Wilmer Valderrama

Wilmer Valderrama

The 38-year-old actor stopped by Los Angeles' Cedars-Sinai hospital on Wednesday (25.07.18) after he found out that his former flame had been found unconscious at her home in Hollywood the day before, and he has been visiting her ever since.

A source told The Blast: "Demi is doing very well. Wilmer is one of the only people who has been around her, besides her mum."

It was previously claimed Wilmer - who split from Demi after six years of dating in June 2016 - had been left very "shocked" by the 'Skyscraper' singer's hospitalisation.

A source previously said: "He knew she was going through a tough time but he wasn't prepared for this.

"He saw her through so many ups and downs and was her rock through some of her darkest moments. To see her back in such a sad and vulnerable place is heartbreaking for him.

"He always cared deeply for her and they truly remained friends after they broke up.

"Demi always hoped they would end up back together in the future. He's the love of her life and vice versa."

Meanwhile, it has been reported that the 25-year-old singer - who publicly revealed she'd relapsed in her addiction battle with her new single 'Sober' last month - fired her sober coach, Mike Bayer, just three weeks before her suspected overdose.

A source said: "She and Mike started having arguments back in March.

"He felt like she was always making excuses for herself, her bad behaviour and not telling him the truth about what she was up to. He called her out on her s**t. which she did not appreciate.

"She fired him a few weeks ago - they had a big argument and then they unfollowed each other on social media. It has been very ugly and messy as this guy was like 'her rock' that she leaned on after she and Wilmer broke up.

"She has been alienating people all around her, but she is very much well liked in Hollywood - people just want her to get well and get help."

It's believed the 'Sorry Not Sorry' hitmaker - who has been battling with alcohol and drug abuse for years - hired Mike after she first sought help in rehab for her addictions back in 2010.