Flat hair? Taylor Swift doesn't know her. The pop star is famous for glossy strands that never look limp - even after long nights onstage and constant styling. And when it comes to getting that kind of lift, she doesn't rely on a complicated routine or backstage-only tricks. Instead, Swift reaches for the Christophe Robin Delicate Volumizing Shampoo, a $42 pick that's all about effortless fullness. The Instagram account @taylorswiftstyled shared a snap after spotting it on her shower shelf in The End of an Era docuseries.