Last week, David won best 'TV Judge' at the NTAs but due to filming commitments he was unable to attend, and rather begrudgingly, Simon accepted David's award on his behalf.
Music mogul Simon was invited on stage to read out David's speech, but he ended up complimenting himself instead!
Speaking to Ben Shephard and Susanna Reid on Good Morning Britain today (26 January), David said: "I've got a feeling I'm never going to get that National TV Award, he's probably already scratched my name off it and put his name on it!"
David, who stars as a judge on Britain's Got Talent alongside Simon, later joked: "It's a great feeling mainly because Simon didn't win it."
Referring to Simon's recent tweets, where his puppies made a public plea for votes, David added: "He got really desperate in the last few days before the voting closed and started tweeting pictures of his dog saying 'please vote for my daddy' and he said he was going to adopt some kittens if he won… And he still didn't win! Mwahahaha!"
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