Blake Shelton and Gwen Stefani have said in the past they plan on taking things slow. However, did the holiday cheer motivate Shelton to move things along and propose? The couple has been dating since November 2015 and have been [going strong ever since.] (https://www.instagram.com/p/B54EZWXHlWR/?utm_source=ig_web_copy_link) The two even worked together on this past season of 'The Voice' as judges. Fans have speculated about when the two love birds would tie the knot. A source that is close to Shelton even shared that he's wanted to propose for a while.