"They put me sitting in front of her at the Logies the last time (2018) and she's behind me, and the photo of me with Delta... I was making a face," the dad-of-two said with a laugh. "My Missus said to me, 'You realise you're representing your company (sic)?'"
He continued after a brief pause: "I have no interest in Delta Goodrem! (But) I like The Voice, I think it's a good show."
Although it's still unclear why Colin and Delta have bad blood, this isn't the first time the veteran judge on the Nine Network singing competition has been slammed in public.
Every year, the 34-year-old judge is mercilessly trolled for her dramatic antics and animated display around the buzzer on The Voice Australia.
"The criticism is all just water off a duck's back because the reality of what I get to live with is very different," she said in May 2017 when asked whether the backlash gets to her. "I have only the intention of making people's day better, and if someone has an intention that's the opposite of that, then that's their problem."
Following this year's Voice finale, Delta was slammed over the fact that Delta Goodrem failed to perform her new single – despite the fact that she had heavily hinted at a performance.
Disappointingly, The Voice’s finale show on Sunday night failed to feature a surprise performance from the Aussie songstress, and there wasn’t a whisper about upcoming tour dates, despite the 34-year-old teasing the possibility of an announcement in the lead up to the finale.