Gwen Stefani and Blake Shelton secretly tied the knot?Some fans seem to think so, after the lovebirds were spotted out and about in Santa Monica, California, over the weekend. In a series of new paparazzi pics, Stefani appears to be rocking a sparkly wedding band next to her engagement ring, sparking rumors that she and Shelton have already said «I do.»Stefani and Shelton wore matching navy shirts and denim jeans for the outing, both topping off their looks with hats.