Simon Cowell has only just realised that he can, at times, be a little too mean to some of the contestants on his talent shows.

The music mogul opens up to fellow Britain's Got Talent judge, piers Morgan, in a brutally honest interview.

Simon said he is “appalled” by the way he treats some contestants and admitted that he initially failed Su-bo but not giving her the support she clearly needed.

He said: “There’s many, many times where I’ve watched the show back and I’m absolutely appalled [at my comments].

“You do the show, you’re not aware of what’s happening in the room outside.

"You know, somebody just said 'My dog Lassie died yesterday', I’m in a bad mood and, you know, awful, and you see it in that context, it’s very, very difficult to watch.”

We think Simon is being a little hard on himself. If he wasn't so mean the shows wouldn't be anywhere near as fun to watch!

Su-bo's road to the BGT final...