The 26 year old, who portrays a young Minogue in new Tv biopic Inxs: Never Tear Us Apart, took to her Twitter.com blog early on Sunday (09Feb14) to alert fans to her heartache.
She wrote, "Asking for everyone to send positivity and love to my precious mummy right now. She's is extremely unwell and we are praying hard Thank you".
Her plea for good vibes caught the eye of pop superstar Minogue herself, who sent Jade a touching message online after the Inxs movie premiered Down Under on Sunday.
She tweeted, "Congrats on your acting debut. I'm not in Oz but can feel the excitement! More importantly sending love to your Mummy".
And Inxs rocker Jon Farris also expressed his sympathies to Jade, writing, "thinking of your mum Samantha... positive vibes".
Minogue famously dated Inxs frontman Michael Hutchence from 1989 to 1991. He died in 1997.