"My beautiful mum Eunice left us today 2000," the perfomer wrote.
"She's always with me, and I feel so blessed to have had her as my mother xxxxx."
This, of course, isn't the first time Patti has honoured her mother on Instagram.
Just last year the singer marked the 19th anniversary of Eunice's passing through the same style of a vintage, black and white photo, this time featuring both mother and daughter.
The post read, "My darling mum Eunice passed today 19 years ago. Not a day goes by that I don't think about her and feel so lucky to have had her as my mother. Always in our hearts."
When it comes to her beloved mother, it's not just this sad day that warrants a post from Patti. The All New Monty star is constantly paying tribute to Eunice on her social media.
Earlier this year, the dancer posted another throwback photo of her mother, accompanied with the caption, "My Mum, who loved everything and everyone, she was such an inspiration to me. I was so lucky to have her as my Mother."
No matter the occasion, Patti's no stranger to pulling her followers' heartstrings on Instagram.
What would usually be an alarming image was placated by Patti's optimistic caption, which read, "Bert's been in hospital, all good. "He's got a Lot of Living to Do."
The post was met with an outpouring of support from fans and celebrities alike, including Home and Away actor Georgie Parker and I'm A Celebrity host Julia Morris; the latter wrote, "Sending all the love in the world... try to get in a few mask smooches."
During what is clearly a turbulent time for the beloved couple, it's reassuring to know that the adorable pair have each other in sickness and in health.