Zoe Saldana says she knows the reason why Britney Spears' star shined so much brighter than other pop stars of her day -- and it didn't have to do with her incredible abs.

The 34-year-old saw the pop starlet in action on the set of "Crossroads," a 2002 MTV Films-produced flick about three best friends who go on a road trip across the country after high school. Although the movie was panned by a majority of critics, Saldana said it opened her eyes to Spears' celebrity.

"Britney's a very beautiful human being," Saldana told Allure for the magazine's June 2013 issue. "After I worked with her, I realized that there was a reason why she was the most popular pop artist over so many other pop artists at that time who were more talented, had better voices. And it was because of her heart, her soul."

Saldana has long been a fan of Spears. In 2011, she told the Daily Beast that she has been on Team Brit Brit since "...Baby One More Time." Although the two didn't necessarily become BFFLs while making "Crossroads," Saldana still gained a respect for her.

"I have so much pride in that," she said. "I played a character I’d never played before—this little Southern belle—and I got to meet an artist that was at her peak at that time. She had the most amazing energy and was always positive and a very discreet person. We were young, too, and got to make a movie about three friends on a road trip. It was so much fun!"

The "Star Trek" actress isn't the only celeb to show Spears some love. Before the MTV Movie Awards last month, Selena Gomez revealed Spears inspired her to get a little sexier with her "Come & Get It" performance.

Earlier on HuffPost:

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    LAS VEGAS, NV - DECEMBER 8: US singer, Britney Spears, arrives at the 1999 Billboard Music Awards, 08 December, 1999, held at the MGM Grand Arena in Las Vegas. (Photo credit should read BRIAN JONES/AFP/Getty Images)

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    LOS ANGELES, UNITED STATES: US pop singer Britney Spears poses with the award she won for favorite new artist at the 27th annual American Music Awards 17 January 2000 in Los Angeles. The American Music Awards winners are choesn by music listeners across the US. AFP PHOTO Jim RUYMEN/jr (Photo credit should read JIM RUYMEN/AFP/Getty Images)

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  • The 40th Annual People's Choice Awards - Press Room

    LOS ANGELES, CA - JANUARY 08: Singer Britney Spears, winner of the Favorite Pop Artist award, poses in the press room at The 40th Annual People's Choice Awards at Nokia Theatre L.A. Live on January 8, 2014 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)