According to a source close to the couple, Blake Shelton calls Gwen Stefani the "unicorn of girlfriends".
The 41-year-old musician has been dating the blonde beauty since 2015, and he considers himself to be a very lucky man, even comparing Gwen to the mythical creature.
A source explained: "Blake jokes with Gwen that she is so hot, and so down to Earth that she is like the unicorn of girlfriends ... women like her shouldn't exist in the real world."
Blake is already convinced Gwen is the perfect woman for him, with an insider revealing he would love to marry the chart-topping star.
The source told HollywoodLife.com: "Blake knows too that if you find yourself lucky enough to be dating someone like Gwen, you marry her. Gwen is marriage material, for sure."