Birthday Poster

Design a trendy birthday poster using purple, lavender, and silver watercolor splash effects on a clean white background. Add sparkles, butterflies, and dreamy bokeh lighting around the composition. Use a fashionable double portrait layout with the young woman wearing a stylish purple blazer dress, sunglasses, and heels. Include modern handwritten typography with premium magazine-style aesthetics, smooth skin details, and cinematic portrait retouching.
Make the aspect ratio 9:16