Cosmopolitan.com has 5 exercises that are said to increase the perkiness of your bust. Check them out!
1. Pectoral Flys - Grasping two dumbbells, lie on your back on the floor or bench. Bring your arms straight to your sides. Lift dumbbells above your chest, internally rotating shoulders, with elbows pointing out to sides. Lower dumbbells to your sides until you feel chest muscles are stretched with elbows in a slightly bent position and repeat.
2. Chest Press - Lie with your back to the floor or bench, clutch dumbbells and position your hands to the sides of your chest with bent arms. Press dumbbells up with elbows to side until your arms are extended over your chest. Lower weights to sides of upper chest and repeat.
3. Push-Ups - Lie facing the floor with your hands slightly wider than your shoulders. Keeping your core tight and your body straight, raise your body slightly off the floor by extending your arms. Lower your body to the floor by bending arms and repeat. (You know the drill.)