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The superstar more famously locked lips with Britney Spears and Christina Aguilera back in 2003 at the MTV Video Music Awards. She later revealed to Out magazine that the kiss had prompted her daughter Lourdes to ask her whether she was gay. To this Madonna replied: "I am the mommy pop star and she is the baby pop star. I am kissing her to pass my energy on to her."
In the meanwhile, the singer - who turns 50 in August - has something to smile about now that her new album, Hard Candy, has topped the Billboard charts.