The Bush frontman kept his wedding band although his estranged wife Gwen Stefani had already confirmed her romance with "The Voice" co-judge Blake Shelton, reported Ace Showbiz.
Rossdale, 50, and Stefani, 46, split after more than a decade of marriage. They share three sons together.
In a recent interview, Stefani talked about the struggle leading up to their divorce.
"I didn't tour at all. But I did record the No Doubt album, which was super hard. I was torn the whole time.