Gwen Stefani and Blake Shelton have teamed up once again for a romantic new single, “Purple Irises.” Stefani wrote the song with Jakob Hazell, Niko Rubio and Svante Halldin, and the passionate ode pays tribute to Stefani and Shelton’s beautiful marriage. Over a breezy country-pop melody, the couple candidly reflects on the irreplaceable bond they share — one that’s changed their lives for the better. Subscribe to Taste of Country on Youtube “But if someone comes along and tries to love you like I love you / Don’t know what I’d do, don’t wanna lose you / If someone comes along and tries to take…