How can i get curves for my body shape?

my body shape is like this -----------> http://www.realself.com/files/no-good-19746.jpg and i have kinda like a boy body shape where i have a straight body shape but have a little curve. but i have a flat stomach but no curves. i want to know if you guys know any exercise that will help me get curvier each day. please and thank you, because im going to the beach in three days and i havent seen my friends in months and i want to suprise them so yes, be detailed and descriptive . bye