THE Los Angeles Confidential magazine party for Forest Whitaker at the Mondrian looked more pre-Grammy's than pre-Oscar. Naomi Campbell and Terrence Howard showed up hand-in-hand. Also hanging out with the guest-of-honor were Alice Cooper, Mary J. Blige, Chris "Ludacris" Bridges, Bow Wow, Deborah Gibson, Natalie Cole, Vanessa Williams and Russell Simmons. "My husband is bringing sexy back," Whitaker's wife, Keisha, announced. "He's hot, hot, hot!" Everyone else was on his or her best behavior, including Isaiah Washington, who chatted with Whitaker about, "doing the right thing."