Jessica Biel and Kim Kardashian Credit: Mark Sullivan/; George Pimentel/

In the battle of the A-list backsides, Kim Kardashian can't be beat!

According to new search data released by, 21 percent of site users searched for information related to the 31-year-old Keeping Up With the Kardashians star's derriere and her workout routine as they prepped for summer bikini season.

Coming in second was none other than Jennifer Lopez, 42, with the American Idol judge and mom of 4-year-old twins' bootylicious behind accounting for 13 percent of all search traffic over the last three months.

Jessica Biel -- who showed off her toned bikini bod June 22 on vacation in Puerto Rico -- was the third most searched celebrity, with users clamoring to know more about how the future Mrs. Justin Timberlake scored her slammin' derriere.

How does the 30-year-old Total Recall actress keep her body in tip-top shape? "For me, getting enough sleep, drinking lots of water, having a healthy diet, and staying away from alcohol are musts," she told ELLE in June 2011. "It's so boring, I know, but doing those things really helps."

As bikini season gets into full swing, users are also hitting up for info on how to tone their arms and abs.

Coming as no surprise, 53-year-old Madonna topped the arms category, with her toned muscles yielding 36 percent of all user-initiated body related searches from March through May 2012. Black Eyed Peas' Fergie, 37, earned top honors for her enviable abs, having garnered 67 percent of Bing's search traffic.