HEAT oven to 350ºF.
PREPARE cake batter as directed on package; spoon into 24 paper-lined muffin cups.
BAKE 26 to 28 min. or until golden brown. Cool in pans 10 min.; remove to wire racks. Cool completely.
BEAT cream cheese spread, Cool Whip, lime zest, juice, sugar and food colouring with mixer until well blended. Spread onto cupcakes. Top with kiwi. Keep refrigerated.