Where are the best places for live music in London?

Last year I went to London. There I did something called "The Pub Crawl". The whole idea is: You pay a ticket, and they show you arround some pubs with some benefits for being in the Pub Crawl group...

Thing is that we were in a neighbourhood called Camden Town. 
One of the pubs we entered had this awesome girl singing live. She was awesome!
Someone there even said that Amy Winehouse used to play there before fame, but I can't confirm this. (NOT this girl, of course).

So, my sugestion...some pub in Camden Town.
Sorry for not being able to name an specific place.

Good Luck!

Camden Townmostly :) This is a good website too

http://www.visitlondon.com/things-to-do/whats-on/music/rock/1

Hi Glen! 

There are some great music venues all over the city - what are you after? 

Try:

O2 Academy Brixton and Hootananny Brixton in South West London 

The Water Rats in North London. 

Seabright Arms in East London is a small, cosy venue

Check out http://www.songkick.com/ for a list of gigs in London. 

Enjoy! 

Jacqui