Why? Because they love the sound of their mother’s voice!
According to the London Daily Mail, studies show that music calms babies, helps them heal faster, and that listening to classical music boosts their brainpower. But it’s not just the music that’s important to a baby. It’s the personal connection. In fact, the more personal the connection, the more they’ll like a particular song. For example, songs sung by mom rated 3 times higher on the likeability scale than pre-recorded songs, based on how much the babies laughed, bounced, and clapped.

The babies tested also preferred music that was synchronized to their moods, because it made them feel secure. So, happy babies preferred bouncy tunes. And fussy, crying babies preferred mellow, soothing songs. And since the mothers were instantly able to adapt to mood changes by singing a different song or altering their delivery, the babies were happier with “mom-music.”

But it wasn’t just the “live” aspect of the music the babies liked. When a stranger sang to them, that song wasn’t preferred to the pre-taped music – with one surprising exception.         
  The hands-down favorite song for every baby was a very tuneful rendition of “Twinkle, Twinkle Little Star” sung by one particular researcher. But she was a trained singer, and much less nervous than the babies’ moms were about singing in public.

So, what’s the takeaway on this? If you want your baby to learn to love music at an early age, turn off the CD player and sing to them with confidence, no matter if you can carry a tune or not.