When it comes to creating memes, you can use just about anything. Completely random photos can morph into great meme content, while at the same time it can be very difficult to predict which memes will go viral and which won't. That said, celebrities are a good bet for people looking to create a surefire successful meme. And while some celebs choose to ignore memes made about themselves, others choose to respond, often joining in the fun.
Check out this gallery to see how these stars reacted to memes about themselves.