3 HRS 40 MIN
Heat oven to 350°F.
Beat cream cheese, sugar and vanilla with mixer until blended. Add eggs; beat just until blended.
Remove 1 cup batter; mix with melted chocolate. Pour into crust; top with remaining plain batter.
Bake 40 min. or until center is almost set. Cool. Refrigerate 3 hours. Top with COOL WHIP and berries just before serving.