Funny? Yes. But not for the reasons they want it to be.
Of course celebrities were going to get in on this, with a few unlikely entries. These aren't funny because these are the Unlikely Celebrities Doing The Harlem Shake, they're funny because someone-possibly on their social media teams, though also, possibly the celebrity themselves-suggested they do this, and thought it was a good idea and a way to improve their image or exposure. Which it isn't. It just makes them look like the rest of the assholes on the Internet doing the Harlem Shake.
The Celebrity Harlem Shake Video (Unlikely Editon)