Here are the many grumpy cat pictures:

[Grumpy cat 1](https://cdn2.thecatapi.com/images/c6eRX5VJa.jpg)
[Grumpy cat 2 (same image, different id)](https://cdn2.thecatapi.com/images/u-svD9g4X.jpg)
[Grumpy cat 3 (once again same image, different id)](https://cdn2.thecatapi.com/images/ge0VijdWQ.jpg)
[Grumpy cat 4 (ditto)](https://cdn2.thecatapi.com/images/EfAnnrwhY.jpg)

This image also has many duplicates:

[Relaxed cat](https://cdn2.thecatapi.com/images/6gE0g4iQw.png)
[Relaxed cat 2 but with a scary filter](https://cdn2.thecatapi.com/images/4Tblp9GzI.png)