16 year-old students Francine Quek and Alysha Ang were among the large crowd of One Direction fans at the National Stadium on Wednesday evening. But these girls came prepared - with zip lock bags.
The girls explained the reason behind the bags: "So we can catch the air that they breathe and keep it forever."
Francine's bags are labelled "Harry's breath" and "1D concert air" while Alysha wrote "H's CO2" (Harry's carbon dioxide) on hers.
Francine added: "I plan to hold the bags tightly and protect them with everything I have. I will never sell this. This is priceless."
The New Paper