Blake Shelton celebrated 30 number one singles at an intimate event at Sidecar in Frisco, Texas, on May 7.<br /><br />However, it was his wife, Gwen Stefani, who stole the show with a heartfelt serenade of No Doubt's Underneath It All for Shelton.<br /><br />The event, held the night before the Country Music Awards, featured A-list guests like Keith Urban and the Backstreet Boys.<br /><br />Attendee Christie Chavez described the cozy venue as a "sports bar grill" and captured Stefani's sweet tribute to her husband, who smiled as she tried to hand him the mic.
