The fourth season of "Little Big Shots" is getting ready to premiere on March 1st. It will have many of the same popular features that the first three seasons had including super-talented kids. The one thing that will be missing is...Steve Harvey, the host. Harvey will be replaced by a new host, comedian and actor Melissa McCarthy. If you wonder why Harvey will be absent and why NBC tapped McCarthy, read on to find out exactly how this all went down.