Jennifer Lopez twirls in a black string bikini, declares, 'Summer mode: activated'

Summer is just around the corner for Jennifer Lopez.

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"Summer mode is on," Lopez wrote on Instagram

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also sending followers to a link in her bio about partnering with Virgin Voyages to give away 1,000 cruises for free.

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Lopez's post drew a slew of flame emojis as well as positive feedback.

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"Gorgeous queen," commented one commenter, followed by "My sunshine."

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Another fan added, "I'm crying, you're so gorgeous."

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Another wrote, "I'm absolutely crazy about you.".

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In an excerpt from her newsletter, " On the JLo," the ageless beauty discussed one of the most important beauty secrets: getting enough sleep.

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I have discovered that sleep, to me, is the most underrated beauty secret out there. We don't value sleep," Lopez, who recently got engaged to Ben Affleck , wrote.

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She added, "There was a time when I slept 3 to 5 hours a night. I was on set all day, in the studio all night, doing junkets and filming videos on weekends.

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