It was finally Selena's 21st birthday. She was so excited about it. Nothing could ruin her moment. Until the memories came flooding back. It's been months since Justin and Selena broke up. She misses him so much that it hurts. And in his point of view, he misses her too. Justin decides to surprise Selena at her birthday party without an invitation. He misses her too much to not be without her anymore. INSPIRED BY A TRUE STORY BETWEEN THEM.