Confetti Party is a pack of vector scatter brushes created for flexible use in Illustrator. The pack comes with a set of circles, stars, and hearts, each with a variety of sizes and layouts (see the 2nd screenshot for the full brush set).
UPDATE (06.20.13): I've added a Photoshop .PSD doc with all of the circle, hearts, and starsincluded, and an .ABR Photoshop Brush too! Re-download to get access. Enjoy!