Success. Anna Kournikova is retired, but that doesn't mean she's hurting for money. In 2005, Forbes estimated the tennis star's pay at $5 million, most of which she earned from endorsement deals with brands like Omega, K-Swiss and Adidas. Her career prize money is listed at $3.5 million. As a singer, Enrique has sold more than 60 million albums globally, and a few of those albums have gone platinum. He's also benefited from advertising with the big brands, such as Tommy Hilfiger.
Attractiveness. This couple is smoking hot! There's a reason Anna's posed for men's magazines like FHM and Maxim: Basically, everyone wants to see her naked. And much of Enrique's music career is based on teenage girls seeing him as a heartthrob.
Popularity. Kournikova was the subject of some 200,000 Google searches in April, while a whopping 1.8 million searched for Iglesias. Thanks to his numbers, these two are in the top half of our list of most popular couples.
Staying Power. This relationship could go either way. On one hand, these two have been together for eight years and show no signs of slowing down. But you can't dismiss the facts: Anna was engaged to a hockey player and later married to another one before she divorced him and started seeing Enrique. Iglesias was linked to a handful of Spanish-speaking celebs, as well as Jennifer Love Hewitt. If their real-life relationship is anything like it appears in his music video below, they should be in good shape.
Compatibility. Anna is a Gemini, while Enrique's a Taurus. He may have been taken with her high-energy attitude at first, but down the line he'll want her to calm down, and he may become too possessive. Not an ideal situation when calendars featuring your girlfriend in a bikini are making the rounds across the world.