It's ice-cream-sundae Thursday On The Set of NCIS: Los Angeles, and almost everyone is indulging between takes. Even LL Cool J, who moonlights as a fitness guru. "Hey, you've earned it," a crew member tells the berbuff rapper/action hero, as if he needs anyone's consent for a sugar rush. The collegial atmosphere continues as Chris O'Donnell passes Daniela Ruah and Eric Christian Olsen, who wrapped their roles a half hour ago yet have ...