Watch Ariana Grande effortlessly perform a hilarious surprise song about being very, very tiny on late night: 'I am a human ...

Lots of people automatically speak to babies with a 'baby voice', using a sing-song rhythm and silly sounding words like 'bunny' and 'doggy'. But how does this affect the way babies learn language?

I'm going to get you to try parentese which is speaking to your baby in a high pitched, sing-song voice. Cristina Parentese is a really important helping hand in your child's speech and language ...