Woffstock?

The dog festival in question in called Woofstock (obviously).

Jaz-Z?

Maybe they were thinking of the Indian bhangra rapper Jazzy B.

Wearing headphone?

Pouring or poring?

Although "pouring" evokes a much cooler mental picture, "poring" is the correct word for this usage.

Amount of users?

I read this headline and thought the word "amount" might not be right, but wasn't sure why.

One of my favourite English usage websites confirmed my suspicion.  The headline should have used "number" (or "proportion", as used in the article itself) instead of "amount", since Twitter users are countable.

What are "would-tenants"?

This was probably intended to read "would-be tenants".

Have you every considered suicide?

The text of the SMS being described is not in quotation marks, so we can't blame teenagers' lackadaisical attitude towards proper English for this one.