Rylan Clark-Neal had collagen "dribbling out" his mouth after his lip burst live on 'This Morning' back in 2012.
The 27-year-old presenter has admitted "half his lip spread across the floor" when he was interviewed on the ITV show following his departure from 'The X Factor' four years ago.
Writing in his new autobiography, 'The Life of Rylan', he said: "I was really nervous about going on 'This Morning', but [the hosts] Phil [Schofield] and Holly [Willoughby] were brilliant and all I remember is that we just laughed and laughed.
"The worst thing happened though. I laughed SO much my lip burst open and collagen filler started to dribble out. I'd had a bit too much filler put in the week before. The f***ing horror. Live on TV and half my lip was spread across the floor."
However, the 'Big Brother's Bit on the Side' host managed to convince viewers he'd sustained a fat lip after walking into a wall, before eventually declaring the truth to the presenters.
He explained: "SOMEHOW it wasn't as awful as it could have been and we continued to laugh at the situation. I joked and said I'd hit my lip on a wall before quickly telling the truth. I remember going into a cosmetic-counter mode and piping up like I was Jackie Stallone: 'I have my lips filled, although mind, you might go off when going through an airport.'
"Someone shut me the f*** up I managed to get through both interviews relatively unscathed."
Tagged in Holly Willoughby Phillip Schofield