Viewers have reacted angrily to an embarrassing slip-up made by Channel 4 on Twitter.

The broadcaster wrongly tweeted that Michael Bublé's son Noah had died of cancer last night. The mistake happened during its annual Stand Up To Cancer charity special, during which Michael joined James Corden for a round of Carpool Karaoke.

It's absolutely impossible not to smile watching this...

Watch the full @michaelbuble @JKCorden Carpool Karaoke Special for @StandUp2C UK this Friday from 7pm on @Channel 4 #SU2C pic.twitter.com/PdOqY1yBua — Channel 4 (@Channel4) October 22, 2018

During the segment, the singer spoke about how Noah had been diagnosed with cancer in 2016 at the age of three and how his family had dealt with the little boy's battle. Noah is now in remission but after the interview, the broadcaster tweeted that Michael talking about "the death of his son from cancer" was "one of the most heartbreaking things we've ever watched". The tweet was deleted almost immediately but was spotted by some Twitter users who urged Channel 4 to take it down.

His son is alive, isn't he? https://t.co/S8VCyEoTPa

— Cal (@CFConnolly97) October 26, 2018

Noah is alive and well-get the tweet changed!

— Alison Duggan Rhodes (@duggo246) October 26, 2018

His son didn't die. Come on @Channel4 you need to change this

— Kirstin Bailey (@Branstonmum) October 26, 2018

During the interview, Michael broke down in tears as he called Noah a hero for beating the illness. "I became the strength to somehow pull us and lift us," he told James. "When they got it out and chemo was done, I just fell. My wife picks me up. "He is five years old now and I say to him Spider-Man is amazing but they are fake, they are not real. You are my hero, you are my superhero."