Why She's Sexy: It's official! Taylor Swift is sexy. No longer is the teen sensation hiding beneath age-appropriate sundresses and long, flowing gowns. At 23, she's striking a pose in outfits that are at times low-cut or strikingly short. She suddenly has legs and curves! It's a stunning realization for fans who've followed her since before she could drive a car. One under-discussed achievement of Swift's is how she's evolved musically as she's matured. Never has she been left to play songs that feel awkward for a grown woman to sing. It's been a natural process.