She’s one of the world’s richest woman and arguably the most famous: now 51-year-old “Celebration” icon, Madonna, reckons she’ll consider adopting more children... if the time is right.

“Never say never,” was the pop star’s reply, when asked by US website contactmusic.com if she’ll open up her family to more children. The star already has two adopted offspring – a son, David, and daughter, Mercy James, from the African nation of Malawi.

Madonna has also told British morning TV show “GMTV” that one of her adopted kids, four-year-old David, is a big fan of her concerts.

“He knows every song, every word, every step, and he wants to wear all the costumes,” Madonna admitted. “He likes my dress that I wear in ‘La Isla [Bonita].” Seems David was smitten when he saw Rocco, the singer’s nine-year-old son with ex-husband Guy Ritchie, jump onstage briefly during a show in her recent Sticky & Sweet world tour. “He’s always been quite shy so I was shocked when he wanted to be in the show,” she said of David. “And secretly, unbeknownst to me, they’re all studying privately with my dancers. And Rocco comes out and busts out like a moonwalk or you know, some kind of break-dancing move.”

Madonna says that while her children are lucky to live a life of privilege, they’re not spoilt. “They get great bonuses and perks out of being my children and they know it, and they’re very grateful and appreciative for it,” she said. “I think they are pretty balanced in terms of how they view fame or celebrity or things like that. I think it took them a while to adjust, but I think they’re okay about it.”