Madonna is reportedly green with envy over daughter Lourdes' blossoming beauty.

The queen of pop - who is well known for her strenuous efforts to keep the aging process at bay  - is said to be bitterly jealous of the 12-year-old's stunning good looks.

A source tells OK!, "I think Madonna can't stand that Lourdes is growing into a beautiful teen.

"She seems envious of her youth and looks. She knows Lourdes is going to be gorgeous and will get the attention of the opposite sex.

"Knowing Madonna's taste for younger guys, it's a matter of course that they'll be dating men the same age. It's disturbing.

"Madonna recently refused to let Lourdes have a hairdresser. She probably didn't want her daughter to look better than her."

See Madonna's attempts to stay beautiful through the years below