Gwen Stefani's "Sweet Escape" from boyfriend Blake Shelton didn't last for long and she's not complaining. Blake Shelton made a surprise appearance at her concert at her Vegas residency. He made a dramatic entrance on stage riding an elevator up to the stairs and descending to the audience's cheers. The two sang their hit duet "Nobody But You" which is currently at the top of the country charts. According to PopCulture, Gwen Stefani was very happy to be reuinted with her long term boyfriend.