The former Mis-Teeq singer and Strictly Come Dancing champion reckons she's by far the hardest of the panel to please.
Alesha has been the show for the past five series alongside Simon, Amanda Holden and David Walliams.
“I feel like I’m pressing my buzzer constantly,” Alesha admitted. “Sometimes I watch myself back and think, ‘oh I’m such a party pooper’ because I’ll be the one buzzing. Even when we had the dog doing yoga I was like, ‘it’s a no’."
She told The Sun newspaper: “There were a lot of good acts in the first episode but, trust me, there are plenty of acts I didn’t like coming up this series.
“As judges we all like different thing – we all have different tastes.”
Alesha went on to say that former 'Mr Nasty' Simon Cowell had mellowed both on and off screen.
She explained: “Simon is so lovely now. He’s been coming across as really nice this series. And that’s a reflection of how nice he is to work with.
“Doing the show with him is an absolute pleasure. He’s been really lovely. And that’s what you want."
Alesha quipped: “You don’t want to be nervous to go to work because your boss is an a**ehole. I get to go to work and know my boss is delightful.”
Britain's Got Talent 2017 continues Saturday nights on ITV.