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Jennifer López celebrates the fifteenth birthday of twins Emme and Max with a private tribute: Look!

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Jennifer Lopez is celebrating an important milestone in her children's lifestyle. Lopez took to Instagram on Wednesday to pay tribute to her twins

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 Max and Emme, in honor of her 15th birthday. Sharing a video for Taylor Fast's song "Fifteen," Lopez opened up about the great love

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The sweet clip, which begins with Max and Emme blowing out the candles on their birthday cake to celebrate the huge 1-5,

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 suggests rare images of the couple over the years, from getting down on mom's level and spending time 

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 Ben Affleck, to memories of Max and Emma when they were babies, and to the circle of instant kin with her father, Marc Anthony.

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Lopez, who reposted the video to her Instagram Story, welcomed twins with Anthony in 2008. And her circle of relatives continues to grow. In addition to Anthony,

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 who recently announced that he will be welcoming his seventh child, his first along with his new wife, 

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A source previously told ET that things are "going great" with the mixed circle of relatives and the kids are "getting along well."

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"Everyone really admires each other," the source said of the youngsters. "Jen's relationship with Ben's kids is natural, and the same goes for Ben's relationship