How do you quote a website?

For academic writing, you reference the website in text the same way you would a book, for example:

Tinie Tempah was said to have had 'an astonishing successful run tonight' (Topping, 2001) at the Brit awards held 13th January 2011.

And then you cite it in your bibliography as so:

Topping, A. (2011). Brit awards: Tinie Tempah shines with four nominations. Available: Last accessed 15th Jan 2011.

N.B. I am using the Harvard referencing style.