Incline Bench Press
Any chest exercise performed on an incline works the top part of the chest. Strengthening and toning this part of the muscle will have a very lifting effect.

Sit down on an Incline Bench set to a 60 degree angle, with a dumbbell in each hand. Lean back and lower the dumbbells to the sides of your upper chest with your elbows under your hands. Press the weights up, keeping your elbows pointing outwards, until your arms are extended. Lower the dumbbells back to sides of your upper chest.
This exercise can also be done at home on a large Swiss Ball. While resting your back on the ball, lower your bum until your upper body forms a 60 degree angle with the floor.
Do three sets of 15 repetitions, resting 1 minute between sets.