Secrecy Is Of The Utmost Importance
It is very important to keep the details of the halftime performance a secret from the public. When Cracked spoke to two performers who previously worked on the shows, they revealed insider details that no one was privy to. They said that the job is protected by nondisclosure agreements. Aside from that, the workers are not allowed to bring cellphones into the facilities. The rehearsals are shrouded in secrecy as well. As a matter of fact, Missy Elliott did not go to the rehearsals until only one day before she made a surprise appearance and joined Katy Perry on the stage in 2015. This happened because the producers had been concerned that word would get out.