All the participants have been filmed performing one of their songs and will have several busking slots in London through this summer. Finalists in each category are chosen by judges but the person who gets the most votes in each category also gets through to the final as a wild card entry.
The finalists will be performing in September and the winners crowned Gigs Champions 2012.
Voting finishes on Tuesday 21st August with the finalists announced on the Mayor's Gigs website on Wednesday 22nd.
We think she's worth your vote - Watch Pearl's performance and cast your vote here!