As far as jeans go, keep them looking casual. Try Hollister's Oceanside Super Skinnies ($49.50) in destroyed medium wash. Skinny jeans are great at creating curves on smaller frames, and you can easily scrunch up the hems if they're too long. Try a bright belt that pulls the whole outfit together, such as the AE Colorful Bar Belt ($19.50). It will draw attention to your little waist.
Don't skimp on the accessories! An outfit as simple as this needs some cute jewelry. The AE Hearts Galore Necklace ($15.50) adds a cute, girly touch and works well with the V-neck. And the shoes, of course, are also important. Slip on the AE Suede Ballet Flat ($29.50) and you'll be good to go.