Miranda Lambert's recent Cause for Paws fundraiser brought in $91,000 for abandoned and abused animals. Lambert hosted the event on May 15 in Tyler, Texas, with a surprise guest -- her fiance, Blake Shelton. Lambert personally donated $2,800 to the charity and auctioned an autographed rare Gibson electric guitar, also signed by ZZ Top, for $8,000. Proceeds will benefit the East Texas Humane Society. "Since we started working with the Humane Society of East Texas over three years ago, we have donated over $325,000, and they have become a 'no-kill' shelter," Lambert said. "Every year, it amazes me that people spend their hard-earned money to partner with us in this fight. I am very grateful."