Create a whimsical, birthday-themed illustration featuring a joyous owl at the center of the piece. The owl should be wearing a vibrant party hat. The background of the image should be filled with a pastel color palette of floating balloons and a garland of pennants that spell out 'Happy Birthday'. The owl is clutching a small cupcake in its wing, with a single, flickering candle on top. Around the owl, a rain of confetti is to be gently falling, creating a soft, festive ambiance that…