Watch exclusive performances from this year's Brit awards nominees PJ Harvey, Professor Green, Anna Calvi and Elbow, who featured in our ' How I Wrote ... ' live sessions

Over the last 12 months, the Guardian studios have been graced by some bright and shiny pop stars, many of whom are nominated for this year's Brit awards.

PJ Harvey's Let England Shake swept all before it in 2011. Will it do the same this year? It's off to a good start with a nomination for album of the year. The video above sees Harvey perform The Last Living Rose.

Professor Green is up for best male solo artist. From his album At Your Inconvenience, here he is with an exclusive performance of Astronaut:

Anna Calvi is up for best breakthrough act. She visited the Guardian studios at the start of 2011 to perform Blackout:

Elbow, nominated for best group, did things differently, inviting us to their Manchester studio to watch them perform a track from Build a Rocket Boys: