As a 16-time Grammy winner who has toured the world and shared her music with millions of fans, Beyonce isn't lacking when it comes to ambition, but the singer says becoming a mother has changed her life in a way that her career never could.

"[Having a daughter] just gives you purpose and all of the things that my self-esteem was associated with, it's all completely different," Beyonce told Anderson Cooper during her Monday appearance on "Anderson Live."

"I realized why I was born and more than anything all of the things I want to pass onto my child and the best way of doing that is not by preaching or telling her but showing her by example, which is one of the reasons I'm here," she explained.

The 31-year-old and husband Jay-Z welcomed their first daughter, Blue Ivy, in January. As the first child of hip-hop royalty, baby Blue has had everyone -- including her parents' high-profile friends -- raving as if they've never seen a baby before. And before she was even born, Blue was guaranteed the title "coolest baby ever."

Blue might also be the luckiest baby ever, as Beyonce told Cooper she does sing to Blue quite a bit. "I sing nursery rhymes [to Blue] and I'm mommy and when she sees me, today was the first time she saw me perform in rehearsal, she was very confused," she explained, adding that she actually makes up a lot of "crazy, corny" songs to sing to her daughter.

Beyonce has already revealed that she "definitely" wants to have more kids, telling "Entertainment Tonight" in May, "I don't know how many. God knows, I don't know yet."

Welcoming Blue into their lives has been nothing but a joy for Beyonce and Jay-Z, as the new parents are even in love with changing their daughter's diapers.

“Actually, [Jay-Z] is very good. We both [change diapers]. I love changing diapers, I love it. I love every moment of it, it’s so beautiful. I love it all,” Beyonce admitted to Cooper.

Check out Anderson Cooper's entire interview with Beyonce on Monday, Sept. 10, on "Anderson Live."

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