First things first. Happy 50th birthday, Dianna! Your secret is out.
If you're looking for simple, you came to the right place. The banner and numbers were made using the Cricut cartridge "Martha Stewart Birthday Cake Art". The border is from an American Girls Crafts punch, cut from both green and red paper, trimmed and layered. Looking at it now, I wish I had taken it a step further and made the flowers a third color. Oh well, I'm lazy and Dianna knows it. I'm sure she's just happy that I finished the card and got it to her on her actual birthday.