While some grooms-to-be will opt for a beautiful traditional diamond, others may wish to surprise the love of their lives with a truly unique engagement ring. And a great example of that true it’s our Top 20 Most Exclusive Unconventional Celebrity Engagement Rings.

1. Anna Kournikova rocked these two coloured engagement rings from her fiance, Enrique Iglesias.

2. Evan Ross gave Ashlee Simpson this pink art deco piece.

3. Behati Prinsloo wears this vintage 1930’s diamond from husband Adam Levine.

4. Cameron Diaz’s chunky yellow gold and diamond ring from Benji Madden pairs with her wedding band.

5. Carrie Underwood wears a canary yellow diamond.

6. Christina Aguilera’s art deco diamond ring weighs in around 15 carats and is reportedly worth around $40,000.

7. Fergie wears this thick diamond band from Josh Duhamel.

8. Scarlett Johansson’s ring is art deco inspired and reportedly vintage.

9. Halle Berry’s short-lived marriage to Olivier Martinez started with this yellow gold and emerald ring.

10. Iggy Azalea’s engagement to her NBA boyfriend might not have lasted long, but her big rock will.

11. Jackie O wore this diamond and emerald ring from John F. Kennedy.

12. Possibly one of the most famous engagement rings in history, Kate Middleton’s diamond and sapphire ring was handed down to her from her mother-in-law, Diana, Princess of Wales.