Christina Aguilera is worried the world will corrupt her daughter.

The 'Voice' USA mentor admits she is very protective of her five-month old-baby girl, Summer Rain, with fiancé Matthew Rutler because she's ''a little more sensitive'' than her seven-year-old son, Max, with ex-husband Jordan Bratman.

She explained: ''Girls are a little more sensitive. I can tell even in her cry. It just takes a little bit longer whenever she gets worked up and upset about something, if she's hungry or whatever, to calm down. She does that little like, 'OK, if I have to calm down now.' It's so cute, though! There's a difference between boys and girls - to me, anyway. Boys are a little more tough, like [they] shake it off a little bit better. But it makes me want to just protect her so much more. Its just like, 'Oh, my God, world! Don't corrupt her!' ''

But the 'Your Body' hitmaker, 34, says Summer is a very happy baby and ''loves life.''

She told E! News: ''She's just gorgeous. She's so beautiful and she's so peaceful and awesome and just a gem. She really is. Just loves life!''

And she insists there is no jealously between the tot and Max.

She said: ''He loves being a big brother. I have no complaints. Beyond my expectations. He's like an old grandma coming in the room. He's seven and he was just so engaged with her.''