The former Spice Girl believes everyone in the public eye should use their fame to help others and can't understand why some refuse.
She blasted: "Do you know what, I think it's disgusting when a celebrity isn't doing something for charity.
"It feels so good and it's so easy - when you've got the money and you've got the exposure - to give something back."
Mel, 33, insists her involvement with numerous good causes has made her become a tougher parent to daughters, Phoenix, nine, and 20-month-old Angel.
She added: "If Phoenix starts crying because she wants something, I say, 'What's the matter? Are you hungry? In pain? No, well stop right now because there are a lot of children in the world a lot worse off than you."
"And the good thing is I can actually come out with the facts which I know now because I support a few charities like Oxfam."
©2008 AOL Australia Pty Limited in association with Bang Showbiz. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
Related Article: Mel B raised £60,000 for charity by auctioning some Spice Girls memorabilia
