Demi Lovato has asked her Twitter followers to donate to a fundraising page for her friend's mother.

The 24-year-old singer took to the social media site to share a link to a GoFundMe page for her best friend Marissa, whose mother is suffering from breast cancer.

Alongside the link, the 'Confident' hitmaker wrote: ''Please help support my best friend and her family through this extremely difficult time. I love you Marissa.''

The fundraising page - entitled 'Marissa's Mom' with a heart emoji at either side - calls for people to donate what they can in order to show Marissa and her family how much people care.

The description on the site reads: ''Marissa's amazing mom has recently been diagnosed with breast cancer. Please donate in any way you can. Every bit counts! Let's show Marissa and her family how much love and support surrounds them during this time.''

And fans of the 'Cool for the Summer' singer have started to donate to the cause, having already raised $1,728 of their $10,000 goal.

One fan - named as Nasser Almisned - donated a whopping $1,000, saying Demi ''changed my life''.

The fan wrote alongside the donation: ''i just donated 1000$, demi is one person who changed my life at a point she is my everything, I know that marissa is her friend and she is someone who like us loves and adores her mother, no person should lose that! (sic)''

Another donor - named Samantha Sharp - gave her support to Marissa as she said she said the woman was in her ''thoughts and prayers''.

She wrote: ''Marissa, my heart hurts for you and your family. My thoughts and prayers are with you all during this hard time. Stay strong and keep your chin up. Your Mom will rise like a skyscraper. Much love to you all, I wish I could donate more but at this time, I just can't. But I wanted to donate atleast a little something. I love you Marissa. (sic)''

According to the donations page, Demi herself has not donated any money to the cause.