The 41-year-old singer-and-actress believes confidence comes from feeling valued, so she always tries to stop herself from thinking negative thoughts about herself.
She said: "I know it`s hard for women to tap into that feeling of self-worth. We need to get the message out that you are valued, you are a goddess and don`t forget that.
"It`s about stopping those thoughts of negativity and insecurity.
"I think changing that and really recognising yourself triggers control of how you feel, so you`re able to go, `No, I`m awesome man, I`m amazing, there`s nobody like me.` I think that`s the big secret to body confidence."
Despite her positive outlook, Jennifer admits she can`t help but worry about negative opinions and responses to her work.
She told Britain`s Cosmopolitan magazine: "It`s easy to let negative stuff get to you. I-m no different to anybody else.
"If I`m performing for 200,000 people and there`s one person near the front row who`s not enjoying themselves, it`ll be that one person who`s going to bother me.`
"That`s why it`s important to remember you`re special, so those messages register more than the few negative ones."