HOLLYWOOD — Scores of little princesses showed up at the El Capitan Theater on Saturday to celebrate the DVD/video release of “Cinderella II.”The onlookers on Hollywood Boulevard really got a thrill when Cinderella arrived in a horse-drawn, pumpkin-shaped coach. After the screening, all the princesses hurried off to the awaiting ball across the street at Hollywood and Highland. And in the usual Disney style, no detail was overlooked. Partygoers were welcomed with a blare of trumpets and a feast served on a 50-foot-long banquet table. Jennifer Hale, who does the voice for Cinderella, gushed, “I am really proud to have worked with this group of people, they make me look good.” Not many of the little princesses had to worry about partying past midnight at this ball.