Fans likely learned a whole lot about Keith Urban [1] when he stopped by The Ellen DeGeneres Show on Thursday morning. First, Ellen schooled him on what a Throwback Thursday, or #TBT, picture is and happily provided him with an example from his younger days. After letting out a big laugh upon seeing the hilarious photo, the country crooner also let slip his romantic plans for his 10th wedding anniversary [2] with wife Nicole Kidman [3], which happens to be the same night he's performing a show in Boston. "The tour was laid out and I said, 'You know I can't work on our anniversary,'" Keith told Ellen. "Nic said, 'What if I come up to Boston and we'll celebrate it together?' And I said, 'Fantastic.' So that's what we decided to do." So cute! Check out the video above, and then see Keith and Nicole's adorable night at the Met Gala [4]!