On Friday's episode of her daytime talk show, DeGeneres jokes with the 46-year-old "Holla Back" singer, "Before I make plans, because I make plans way ahead of time, tell me when you're getting married."
"You're crazy," Stefani responds. "OK, I'll let you know."
Stefani also chats about what it was like having her three sons on tour with her over the summer, revealing that her middle child, Zuma, especially loved the experience. "He had his flashlight, headphones, and he walked me on and off the stage every single night," she recalls. "For two hours, he worked back there. He was so into it."
Shelton's buddy on The Voice, Adam Levine, just had a baby with wife Behati Prinsloo, and Stefani says he's been in constant contact with her since he welcomed his first child. "Adam just had a baby so he's been Facetiming me all day," she shares, adding that his daughter is "so cute."
Stefani also opened up to ET about going on tour for the first time in seven years, and gushed that it was like "being in a dream." Check out our interview with the rocker: