Chaka Khan is constantly trying to "fine-tune" her life

Speaking to the Guardian newspaper, she shared: "I am trying to fine-tune my life, so I am always trying to look at what we can change or fix to be more productive and more helpful.

"I want to be here for a good reason and not to just take up space and breathe in precious air for nothing."

Chaka's career has spanned more than five decades and she's achieved a huge amount of success, winning as many as ten Grammys along the way.

However, the music legend still feels a sense of hopeleness about the world at large.

Asked what makes her feel unhappy, she said: "How hopeless things are looking on this planet. That's my biggest sorrow. I am mourning the death of this planet already."

Meanwhile, earlier this year, Chaka slammed the music industry for encouraging artists to compete with each other.

The singer - whose real name is Yvette Stevens - told Metro newspaper: "Competition is just horrific and wrong. Right now, we need to start with this thing - which is something with each other.

"These labels and businesses count on who can (do better) - but there is no competition.

"Be honest and faithful to yourself and your self-expression and don't be afraid and don't be competitive."

Chaka has also urged up-and-coming artists to remain true to themselves.

She said: "These days, you just have to be about what your goals are about, and staying true to yourself. That's a big thing to do."