With my friends having babies and my brother and his wife thinking about having 1 I came across this. They're rock songs that are made into lullabys. I thought they were cool and thought I'd share. One group I found is called Sleeping Sparrow there are a few others out there as well. I linked to 2 of them below.

Greenday Basket Case
https://www.youtube.com/watch?v=hZcWQarrYsg

Blink182 All The Small Things
https://www.youtube.com/watch?v=dkqVCe0g9nY