Microwave the cream cheese for 20-30 seconds and stir (should be very soft and room temperature). Blend with whipped cream by gently folding or stirring. Set aside.
In a seperate bowl, thoroughly mix pudding with the warmed orange drink to dissolve. Let sit for a few minutes, then mix again. Gently fold or stir in the cream cheese mixture a little at a time (it's great to get a swirl like effect).
Cover top of mousse with plastic wrap and chill for at least 4 hours. Scoop into dessert or champagne glasses using a large melon baller and garnish with fresh orange slices on the side of the glasses and top with a mint leaf.