It's possible, but in a world where copies and imitations are cheap, authenticity becomes more valuable. Would Charli XCX's brand and image benefit from having a shallow AI clone out in the world? In most cases today, when streamers introduce bots, they give them a separate on-theme identity. I'd be willing to bet that creators would gravitate more towards that approach with these AI characters as well.

Of course, that character (or can we still just call it a bot) could still shill promotional content...