Britney Spears has revealed that, like most normal people, she finds it hard to get motivated for the gym even though she knows she really should go.

The singer, who starts her two week residency at the O2 Arena in London tonight, told More magazine: “I used to be a workout freak, but after I had my kids, it was a lot harder for me to get back into that routine.

“I used to love going to the gym but then as you get older and you have more responsibilities, you lose that kind of discipline.

“Even now, I have a much harder time getting mentally psyched to train, but once I’m in the gym, I start getting into it and I feel great.”

She added that she’s taking good care of her mental health too these days: “I’m learning to take better care of myself and not get stressed or down about things for nothing.

“I’m taking my time these days and not letting myself feel any pressure other than to just feel happy about myself and to work on my music.”