As Cat and co-host Andi Peters spoke to Bob and Midge Ure about Band Aid, Cat made a slew of factual mistakes.
When Cat told viewers that Band Aid had raised almost £2million, Bob quickly corrected her that it was actually £480million.
He joked: ‘You’ve never done this before?’
Cat said: ‘Never, I’m a spring chicken!’
If that weren’t awkward enough, Bob was forced to correct Cat for a second time, swiping: ‘Are you doing your research?’
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Cat Deeley was left red-faced after a string of blunders forced Bob Geldof to step in and correct her on Tuesday’s This Morning
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As Cat plugged the upcoming Band Aid documentary which explores the footage from the first ever single, Do They Know It’s Christmas, she told viewers the wrong channel.
When Bob told viewers the documentary would be out later this week, Cat interrupted ‘On Channel 4’.
But Bob said: ‘No, not Channel 4, BBC Four.’
He fumed: ‘Who briefs you? Who does your research?! Deeley. It’s BBC Four for god’s sake.’
As become red-faced, Cat held up her script notes to hide her face with embarrassment.
Andi quipped: ‘Oh no, shamed by Bob Geldof live on telly, I love it!’
Despite Cat’s mistakes, the hosts and Bob got on like a house on fire as they laughed off the blunders.
Speaking about the documentary, Bob said: ‘That Sunday morning when a bunch of young spotty English pop stars who were (more or less) just out of school and had taken over the pop culture of the world.
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When Cat told viewers that Band Aid had raised almost £2million, Bob quickly corrected her that it was actually £480million
+8
View gallery
He joked: ‘You’ve never done this before?’, Cat said: ‘Never, I’m a spring chicken!’
+8
View gallery
If that weren’t awkward enough, Bob was forced to correct Cat for a second time, swiping: ‘Are you doing your research?’
+8
View gallery
As Cat plugged the upcoming Band Aid documentary which explores the footage from the first ever single, Do They Know It’s Christmas, she told viewers the wrong channel
+8
View gallery
When Bob told viewers the documentary would be out later this week, Cat interrupted ‘On Channel 4’… But Bob said: ‘No, not Channel 4, BBC Four’
+8
View gallery
He fumed: ‘Who briefs you? Who does your research?! Deeley. It’s BBC Four for god’s sake’
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‘Ambled up a Ladbroke Grove street in London to make a song their friends had written for the starving people of Ethiopia, they could never have understood the enormous consequences of that day.
‘It was, if not exactly the “shot that rang around the world”, it certainly became, however unwittingly, “the shout that rang around the world”.
‘Culminating 20 years later in all its unlikely majesty in ultimately forcing the global political process to bend to its focused will at the Gleneagles G8 summit of 2005 and after the Live8 concerts.’
He added: ‘I love it because it is so… English. So guileless, so charming and yes so innocent.
‘These rock stars piling into the control room, babies under arm – it was a Sunday, family day, chipping in, laughing, shouting suggestions, taking the p***, funny, having fun making history, on top of the world.’
BBC is marking 40 years of Band Aid with a 75 minute documentary, The Making of Do They Know It’s Christmas?, of the rare and unseen moments.