Why is my friend lying about getting a new house?

My friend has been telling us that she is moving into this really nice house for the last couple months. She still hasn't moved and keeps talking about the house. I don't really care where she lives so why is she lying about this? Should I confront her or go along with it?
Update: we are adults so we no longer refer to people as popular. We are already friends so I don't think that is really an issue.
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