The Dance Again pop star was accompanied by her choreographer boyfriend Casper Smart, and the couple happily posed with the football legends who jumped at the opportunity to take photos with her.
"Happy to have met @JLo and @BEAUcasperSMART at the game yesterday," tweeted Cristiano, sharing a snap of him and the loved-up couple.
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"Happiness is having friends like @JLo near...," posted Sergio, showing off his new blonde hair and posing in between Jennifer and Casper.
As an eager Real Madrid fan, Jennifer has attended their matches on previous occasions, proudly sporting the team's football shirt, and has met some of the players before.
At the team's friendly match in Los Angeles over the weekend, Jennifer looked cool and casual in sunglasses, jeans and a white t-shirt printed with the phrase, "Love is the only way". She seemed to act as the lucky charm for the Spanish team who won 2-1 against the Liverpool-based squad.
Earlier in July, Jennifer and Casper attended the Premios Juventud 2013 in Miami, dubbed the Spanish People's Choice Awards, where the pop singer performed twice on stage and later accepted an award. Sitting in the crowd was her ex-husband, Marc Anthony, with his Topshop heiress girlfriend Chloe Green.
Jennifer and Marc, who have twins Max and Emme together, split up in 2011 after seven years of marriage. She then went on to date her back-up dancer Casper in October of that same year, and the couple have been inseparable since.