Pam Anderson and Kirstie Alley Acting Like Divas With The Stars?

Sources close to the production tell us ... Pam requested her trailer be fully stocked with cases of bottled coconut water called Beyond. Not so crazy, you say? Well the brand is imported from Australia ... and almost impossible to find in the U.S.

Meanwhile, we're told Kirstie REFUSES to eat the craft service food provided by "DWTS" because she must follow her custom designed diet program Organic Liaison -- which the crew hauls in for her daily.