Shakira keeps her wavy hair frizz-free by using her own products which she had developed in a lab. The 47-year-old pop superstar has revealed she grew frustrated of using products that failed to live up to the label, so she splashed out on having her own hair line created to suit her needs. During an interview with Allure magazine, she spilled: “I’ve tried every single hair product on the market. There are not many out there that can deal with damage, moisture, frizziness, shine, and all of that so … “I went to a lab and developed my own products for myself, my own line.” Shakira went on to …