In a large bowl, combine the graham cracker crumbs, butter and sugar. Press onto the bottom and all the way up the sides of a greased 6-in. springform pan. Place on a baking sheet. Bake at 350° for 8-10 minutes. Cool completely on a wire rack. Set aside.
In a large bowl, beat cream cheese until fluffy. Beat in the sweetened condensed milk and lemon juice until blended. Fold in sour cream and whipped cream. Pour into crust (pan will be full). Refrigerate overnight.
Carefully run a knife around the edge of pan to loosen. Garnish with strawberries if desired. Refrigerate leftovers.
Editor's Note: Six-inch springform pans are available from Wilton Industries, Inc. Call toll-free 1-800/794-5866 or visit their website, www.wilton.com.