Why is a major country-music star teaming up with a cute online kids' game? The story involves a singing monster, an 11-year-old kid, and the power of social media.

Sugarland's Kristian Bush character is named Shugabush; Inspired by his 11-year-old son, Sugarland's Kristian Bush donned a figurative monster costume to become a fedora-wearing, mandolin ...