2015, March 11 (ca.): The Purple Dress
Sometime previous to March 11, 2015, when the story was first published, Bethany Harvey took a selfie of herself and her nephew; her sister hopped into the background at the last minute, so Harvey titled the shot as "Photo bombed!" and sent it up to Snapchat so all her friends could see it.
It was only later that evening that Harvey realized something strange had happened, when a friend came by to visit and pointed out the person wearing the purple dress in the background of the shot.
When the picture was taken, only the living room door should have been behind Harvey and her nephew; not a person sitting, where there was nowhere to sit. When interviewed later, Harvey insisted there was no one else in the living room with her and her nephew and sister, "except for the ghost girl in the purple dress."
Harvey added that "a lot of creepy things have happened in the house," and that the living room especially bothers her. She doesn't enter it when its dark because she fears she might see something.
Things to Consider
This story was first published on the Irish Mirror website, and the Irish Mirror -- any of the Mirror websites and papers, really -- is not the most reliable source for news. It needs to be noted, also, that their website includes a prebuilt sub-index for 'Ghosts', showing they have posted a great deal of ghost stories and plan to post a great deal more, having recognized it as an important income stream for their site.
All the Irish Mirror tells us about the location of the apparently haunted house above is that its in Northern Ireland. More importantly, ignore the photo when considering if this event happened or not... because the photo shows nothing paranormal. What makes the photo paranormal is the statement that no one was sitting behind the three identified people, and that is what must be questioned and tested; because the photo could be produced by just having someone sitting there.
And on a personal note: I really dislike the overuse of red circles and arrows to highlight features in photos like this. It doesn't help. Don't do it.