As I've told you bloggers in the past, receiving a Cease & Desist/take down order via email is not legal unless a physical copy is also sent via certified mail.
Most celebrities and their high powered legal mouth pieces think you don't know that. So they'll try you in the hope that the email by itself will be sufficient enough to scare you into taking the post down fast.
Celebrities with substantial personal wealth at their disposal arrogantly believe that most bloggers are broke and we don't know our rights. Celebrities think money is power when, in reality, it is not. Knowledge is power, and without it you are defenseless.