When you're in a fashion rut and unsure of what to wear, you owe it to yourself to try out some flowy trousers. This year-round staple always comes in handy, especially for a fashionista in her 40s.

Serena William's poolside look consisting of bold printed beach trousers with a matching bikini and headband has prompted us to start planning our swimwear combinations for this summer.

3. Beach Babe: These flowy palazzo pants are a spring vacation essential. They’re ultra-lightweight and easy to pack! 4. Retro Florals: Love the ’70s-inspired, flower power aesthetic?