Deadpool 3 is set to have a lot of cameos, many of which will likely be humorous fanservice. Likewise, some of these Easter eggs will exist to allow fans a final goodbye to the Fox X-Men movie universe. The potential is endless for how these cameos might manifest, but one of them might involve a prominent pop star who's ironically been "tied" to the X-Men before.
Source：https://www.cbr.com/deadpool-3-not-first-time-taylor-swift-dazzler/
