1. The weather has turned to s***.
2. Everyone's in a bad mood on Twitter.
3. The best song ever failed to make it to number one.
4. There's been a surge in jellyfish numbers.
5. No-one has noticed that Nick Clegg is running the country this week.
Also on HuffPost:
I'm really sad
I'm really, really sad
Can someone cheer me up?
I feel sad when I wear headphones
No, nothing seems to help
I feel sad when I look down
I feel sad when I look up
I feel sad when I measure things with my hands
The lion and unicorn make me sad
I feel sad in crowds
Europe = sadness