The 'Booty' singer said the whole environment in the house gave her a sense of what life must be like for the 'Maleficent' actress, who has three adopted children and three biological children with fiance Brad Pitt, reported Radar online.
"When I was married to Marc, he had two boys, a girl and a stepson so there was four - (with the twins) there was six. When we went out, it was like Angelina and Brad. We had that flavour and I loved it," she said.
"They're growing up so differently than me. I grew up in The Bronx - we shared a bed until we were 16 and it was so different. (Emme) and (Max) have their own rooms; we live in a big house.
"When we go to grandma's house they're like, 'Grandma's house is small.' It occurs to them that this is different, so my whole thing is about teaching them to be aware of the world and realising that we are in a position now that we can help other people...," she added.