First things first... The Hoff. Is he always switched on and in Hoff-mode?
"No, he is The Hoff every minute of the day. I'll give you some good examples of this. When he's tired, he'll say 'Oh, me needs a cup of Hoffee'. And he's got these T-shirts that say things like, 'Drop it like The Hoff', 'Don't hassle The Hoff', 'Have a Hoffee time'. It's just amazing."
Is there any merchandising he hasn't cornered yet?
"No, I don't think there is. It's like his own world. He is just like a machine. He never stops working. Even in our days off, he would travel to Germany to do gigs. It's just phenomenal really."
Because he's in this bubble, is it weird to work with him?
"It doesn't make it weird, but you never know what to expect. I didn't really know what he'd be like. I didn't know if he'd be serious, whether he'd be up for having a laugh. But overall, he is up for having a laugh and I think he knows what he does is funny. I think he knows the whole talking to the watch thing is silly. I'll tell you another thing about The Hoff, he has an industrial sized hairdryer. When he plugged it in, it blew up all the lights on his make-up stand - it's just amazing. It happened three times."
Was Michael Collings as great as everyone made him out to be?
"The thing with Michael Collings is that it was exactly what we said we wouldn't do again and pre-judge. It was like SuBo and Paul Potts all over again. When are we going to learn our lesson and not judge on the look, go on the talent. Because again, I didn't expect Michael to have a voice like that. I also don't think it's the same old, same old voice. There's a different tone there. He's a very talented guy, so I think he will do really well. If you close your eyes and listen to him, you'd go, 'That's incredible'. I think he's a smart guy and he'll do alright."
I liked the fact that he was quite jolly and funny as well. No tears...
"Exactly. There's no sad story. He's like, 'I've got quite a posh caravan actually'. I love that attitude. He just seems like a very honest guy, which is lovely."
Is this finally the year where a non-dance, non-singing act wins?
"I think you could be right there. There is a lot more comedy and a lot more magic. I think the comedians this year felt that they had more of a chance with Michael on the panel and for magicians, The Hoff comes from the land of magic that is America. But having said all that, I do think someone young could win this year."
Why have magicians always struggled so much on the show?
"The problem was that Piers and Simon always wanted the lions, tigers and elephants. They wanted the Las Vegas stuff. If a magician didn't have that, it was a reason to buzz in. Also, within the magic community, they were quite negative about it and put off by the whole thing. Now there are a couple of magicians auditioning, who I know have said, 'We'll give it a go this year, because we'll get a fair crack of the whip at it with this panel'."
You've lasted as the host of BGMT for five years. What's your secret?
"Things like Big Brother's Little Brother changed hands; Xtra Factor is a perfect example - they've gone through Ben, Fearne, Holly and now Konnie. It's like every other series, there is someone new. I think our secret though is that we don't ever stand still. You will never switch over from ITV1 and think, 'I've seen half of this already'. Also, we get Ant & Dec involved, we get the judges involved and we always do that in a spontaneous way and change it every year. Things like The Hoffice sketch, that was never intentional or planned, it just happened when we met him. Also it's about dedication. We had cameras filming The Hoff from the moment he arrived to the moment he left, so we don't miss a single nugget."
Where did Konnie Huq go wrong on The Xtra Factor?
"I don't think she went wrong, but the reality is that an ITV2 spinoff show is a very hard thing to do. It's a very hard thing to get right. I don't know whether she felt uncomfortable doing it - for whatever reason it didn't work. You are working 24/7 on these shows and it's a lot harder than what you do on ITV1. In the end it just didn't work and it's a real shame for her because X Factor is such a great brand to present. But I felt sorry for her a bit when it came to the criticism. As a presenter, technically, I think she's very good, but it just didn't work."
I'm sad that the Ferrero Rocher eating man isn't back this year. He was always my favourite.
"That really caught on didn't it! The funniest line, and I'll always remember this, is when we were doing that challenge in the live shows and Lionel Blair had a go at it. Someone in the studio team shouted, 'Suck the nuts off that Lionel' and it just really made me laugh."
That reminds me of the Chuckle Brothers outburst on last year's show...
"They are the two people... I couldn't control them properly. I remember the line that he said. I'm laughing now thinking about it. It was Paul Chuckle and we were talking about choreography and whether it was better to get someone helping you or do it yourself. At that point, Paul went, 'Oh it's always better to do it yourself'. I mean, I grew up watching those two. I just sat there and because it's live, there's nothing you can do. That's the beauty of live. You never know what's going to happen. I'm pleased you mentioned that because it's really made me smile."
When can we see some more Mulhern on the box?
"Well Animals Do The Funniest Things is coming back. And we're in talks at the moment about a gameshow. A monetary gameshow. That's in development. So fingers crossed."
That's not the Simon Cowell gameshow is it?
"Oh no, but I wish it was! I wish it was!"
Britain's Got More Talent continues Saturday, April 30 at 9pm on ITV2.