New York, June 29, 2009 – Mariah Carey apparently plays all the parts in a new music video she was filming at the Plaza Hotel in Manhattan on Monday, including a male bellhop/doorman type character, and a male stalker who the Daily News assumes to be Eminem. 

But being dressed as men was not the only change we noticed in Mimi.  The notoriously demanding diva was in a great mood, laid back, hard working and self-effacing during the video shoot.   She took direction, laughed, got the scenes down fairly quickly, and apologized to the crew when she screwed something up. 

Mariah laughed at herself when she couldn’t figure out how to operate the iPhone her hoodie-clad male character had to use in one scene.  She kept turning it around every which way, attempting to snap a photo with it.  Obviously confused and embarrassed, Mariah kept her cool and laughed at her ineptitude and apologized for causing the delay.  (Funnily enough, the Apple store was directly across Fifth Avenue from where she was standing.)

Mariah seemed to really be into making the scenes come alive, and maintained her completely un-diva-like demeanor through multiple costume changes, with crowds of onlookers and paparazzi watching the entire time.

Mariah's professional behavior was in glaring contrast to Jennifer Aniston's hostility on her film set this week.