Subject- Agency law between a principal and an agent: An entertainment agency is representing a singer as their agent. The agent contracts a third party and the third party makes a judgement error or a promise that everything will be ok, however, as a result of the third parties mistake, the singer is no longer able to go ahead with their shows.

Q. what is the liability of the principal (the singer), the liability of the agent and the liability of the third party?

how does Tort negligence come into play and estoppel?