Readers' Poll: 8 Best Britney Spears Collaborations

See where her unions with artists like Pharrell, Madonna rank in our weekly poll

8. "Tom's Diner" by Giorgio Moroder

Spears' most surprising collaboration happened more recently when she teamed up with disco legend Giorgio Moroder for a clubby, electronic take on Suzanne Vega's hit "Tom's Diner." Spears is out of her comfort zone on the track and makes it all her own for a fun, and unlikely, cover from the ever-surprising pop star.