Popp was then called up for the 2011 FIFA Women's World Cup. She played in all four games as a substitute, but the Germans were eliminated in the quarter-finals by eventual champions Japan. Later that year, she played in a European Championship qualifying match against Kazakhstan, where she and teammate Célia Šašić each contributed four goals to a record 17–0 victory. With this achievement, she became the seventh German woman to score four goals in an international game.
