I guess it's possible. One artist singer musician rhythmic talker pretty much sounds like all the others.
There have been similar stories about other singers, including the Beatles. I think that Elvis is included in the conspiracies as well, except that he was just killed and not replaced. There is not much actual proof for any of the replacements, but definitely some interesting things for speculation that this could be true. https://www.reformation.org/beatles-were-titaniced-in-1966.html However, if you read the Laurel Canyon book, which IS well documented and provable, it does make the other replacements seem at least possible, if not probable. It is written by Steve McGowan, who many believe was actually suicided by the government. In any case, he died of some kind of cancer, whether artificially induced or natural. McGowan has written several books, including a very interesting one about the moon landing, called “Wagging the Moondoggie”, and has a lot of actual facts to back up what he says. I can’t remember whether he mentions the Beatles in any of his books or not.
Here is another interesting one, not exactly a replacement, but similar. This video shows a side by side picture of Brett Kavanaugh when he was being appointed to the Supreme Court, and was being accused by Christine Ford.
After much speculation about whether something happened to Kate Middleton, especially after photos of her with the children appeared and were then said to be photoshopped. Next, they showed pictures of Kate and William just out shopping, but those were said not to be her either. After that, she released the video announcing that she has been being treated for cancer, just like King Charles is. Now, people are questioning this video , too, and wondering if it might be AI in some way. For one thing, she seems to be wearing the same clothes from a video taken several years ago, which seems like an odd choice, and people are also wondering why more of her family (at least her husband) are not there with her to make this announcement. We have all seen the videos where it looks like Morgan Freeman is talking, but it is actually a manipulated photograph (kind of like those fake talking/singing dogs and cat videos we see all the time), and it would be very easy to have use an older photo of her and made this new video. You can see how similar the two photos look, although they are over seven years apart.