The Most Expensive Celebrity Engagement Rings

Anna Kournikova and Enrique Iglesias usually kept their relationship on the down low until she went public with a rather large radiant-cut canary diamond on her special finger. The unique, yellow diamond is set in platinum and has two other diamonds on either side. The real kicker here is that this may be her second engagement ring. The tennis pro was spotted with a huge 11-carat, pear-shaped pink diamond back in 2001 which was easily worth up to $2.5 million dollars.

These days she has mostly spotted with the yellow one, paired with an equally impressive wedding band, though it's unclear when they got married. They have three children.