She told her family members: “Joe thinks it’s a snake but I think it’s a lizard.”
Their outing came just days before Dianne’s grandad died, with the star speaking out in a moving tribute online.
Taking to Instagram, she posted a series of photos and videos of her “Pop” in view her 853,000 followers.
She captioned the post: “Rest in peace pop.
“I will cherish all my memories with you forever and ever. You were a very special man to so many people.
“You told me so many stories that I will never forget maybe because you told me the same ones a million times but the way you told them I could listen another million more.”
She added: “Love you so much and I know you will be looking down on all of us I’m so glad I got to spend Christmas with you Xx.”