Preheat oven to 350°. Grease 13 x 9-inch baking pan*; set aside.
Combine cake mix, cinnamon, nutmeg and ginger in large bowl. Beat in Hellmann's® or Best Foods® Real Mayonnaise, eggs, carrots and pineapple with electric mixer at low speed 30 seconds or until moistened. Increase speed to medium and beat 2 minutes. Stir in walnuts. Evenly spread into prepared pan.
Bake 30 minutes or until toothpick inserted in center of cake comes out clean. On wire rack, cool 10 minutes; remove from pan and cool completely.
For Frosting, beat cream cheese, confectioners sugar, Country Crock® Spread, lemon juice and vanilla in medium bowl, with electric mixer until light and creamy, about 5 minutes. Evenly spread frosting over cooled cake. Garnish, if desired, with additional chopped walnuts.