Stefani doesn't seem to mind Levine being so territorial over Shelton as long as the pair keeps her laughing. "I literally laugh all the time because of these guys," the No Doubt front woman said. "Me and Pharrell [Williams], we have smile headaches when we leave work. We have to do massages, take it down, because it's crazy." She then told Levine, "[It's] such good chemistry
you guys have. We all have."