The Queen of Pop has revealed that her children's transition into adulthood is taking her by surprise day by day.

Madonna told 'Good Morning America' earlier today (June 21) that her two oldest kids, Rocco (12) and Lourdes (16), are growing up fast and as a mother it's hard to experience:

"My daughter (Lourdes) just got an iPhone, she's 16... (and now) she (has) stopped talking to me. It's kind of uncomfortable; she's still my little girl, but she's also a woman. He's (Rocco) a foot taller, he's getting facial hair, he's looking at girls' butts. It's terrible!"

During the premiere of her 'MDNA Tour' DVD this week, Madonna explained that having her offspring on the road with her was so much fun and it was great to be able to teach them the importance of earning a living:

"[It was] great and amazing to work with both of them. I think working and earning a living is always a good experience for a child."

Watch Madonna's 'Good Morning America' interview below: