In a moving video shared to her Instagram, Delta Goodrem has revealed for the first time she suffered a secret health battle back in 2018.WATCH BELOW: Delta Goodrem's harrowing secret health battleThe six-minute video (watch above) detailed the deeply personal journey that she went through while writing her new single Paralyzed and what it meant to her.“Delta woke up from surgery to find that she had lost the ability to control her speech,” text in the video explained.“Complications after the removal of Delta’s salivary gland led to a paralysis of a nerve in her tongue.”“I’m taking this as a rebirth thing, that’s what it means.”An emotional Delta appeared in the footage in hospital and is audibly unable to speak the same way she normally.