The 44-year-old No Doubt singer and the 38-year-old country singer were on the show to promote the seventh season of their hit show The Voice, which premieres on Monday (September 22).
Earlier in the week, Gwen rocked red kicks while stepping out for her routine acupuncture appointment in L.A.
Gwen Stefani & Blake Shelton – ‘Tonight Show Starring Jimmy Fallon’
FYI: Gwen is wearing earrings and necklace by EF Collection, ring and bangle by Graziela Gems and earrings by Vita Fede.
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