The Instagram photos she shared were of herself at 15 years old, trying to impress the seniors at her high school.
She also shared a message telling young girls not to do smoke cigarettes because you'll see how 'dumb' you are when you grow up.
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'15 year old Cardi ...Dear little girls don’t smoke cigarettes or weed trying to look cool for the seniors cause you really gonna grow up and see how dumb you look doing it,' the Bodak Yellow rapper began.
'Seriously tho what was I thinking? Anyways naaa my mustache was too much,' she joked.
One of the photos showed the teenage Cardi lighting up a cigarette while holding a Guess? bag
Cardi B started going viral with Vine and Instagram videos in 2013, before joining the cast of Love & Hip Hop in 2015.
She was on the show for two seasons which charted her rise to fame before leaving the show to focus on her music career.
She released her first studio album Invasion of Privacy in January 2018, making history as the first female artist to have five top 10 singles simultaneously on the chart.
She became the first female artist to win Best Rap Album as a solo artist and just the third female rapper ever to be nominated for Album of the Year after Lauryn Hill and Missy Elliott.
She revealed in October that her second studio album, Tiger Woods, will be dropping in 2020
Cardi B also made her feature film debut in the indie hit Hustlers and she has also been confirmed to star in Fast & Furious 9 in an unspecified role.
