Kathy Hutchins / Shutterstock.com   Blake Shelton was a surprise co-host on NBC News’ Today With Hoda & Jenna on Wednesday, where he revealed that he and Stefani are hoping to tie the knot “this summer.” Blake joined Hoda remotely from LA and told the host, “With COVID-19, it looks like it may be OK, but I don’t know. So, that’s…