If your dress is strapless, you'll want your shoulders to look strong and beautiful -- especially if you're planning to wear your hair up. Shoulder presses not only work your trapezius and deltoid shoulder muscles, but they also help strengthen your upper back muscles (the rhomboids), which makes this exercise even more appealing! Again, for this exercise, you can use dumbbells or anything with weight.
Start in a standing position with feel shoulder-width apart, knees slightly bent. Hold your weights at shoulder height with palms facing inward. Push both weights up above your head, extending your arms fully. Slowly bring your weights back to the starting position at your shoulders. This counts as one rep. Repeat 14 more times to complete one set. Try to do three sets.