What do Mariska Hargitay, Vince Gill, Jack Black, and Mr & Mrs Ben Stiller have in common? For one thing, they don't sport Brazilians. They're all big fans of Betty Beauty, the dye for folks who want a snatch to match. The product comes in a variety of festive colors, the most popular being hot pink, says Betty Beauty's creator, Nancy Jarecki. "People seem to have fun with that one." Jack Black + pink bush = not fun. (Page Six)