What Is It with Cassie's Baby?

On the right hand side of my blog, there is a column titled Feedjit Live Traffic Feed. It's interesting for me to see who searches what and lands on my blog. For quite some time now, I have noticed many searches for Cassie's Baby. Today when I checked, I saw hits from Denmark, Prince Edward Island, Costa Rica, Toronto, London and Montreal, Canada, Portugal, 3 separate hits from Brazil (all different cities), The Netherlands, Spain, and Mexico - along with someone from Florida, Pennsylvania, New York, Maryland, Texas and Missouri. Now I ask, is that a song or movie that is poplar right now? I'm puzzled.