The diagnosis came within hours of Cabello thanking fans for their concern about her health.
Both artists performed at Sunday's 2018 Billboard Music Awards.
The "Look What You Made Me Do" singer is feeling the girl power.
The two became good friends after collaborating on 2015's 'I Know What You Did Last Summer.'
The hottest stars stepped out to attend the annual ceremony in Inglewood, California, on Saturday.
Fifth Harmony announced on Monday that the group is going on an indefinite hiatus to pursue solo endeavors, and a source tells ET that Camila Cabello's early exit in December 2016 wasn't a factor in the decision.
ET breaks down all the clues that Lauren Jauregui, Normani Kordei, Dinah Jane and Ally Brooke were heading for 'solo endeavors.'
The group has been together for six years!
The 21-year-old singer also opened up about her relationship with boyfriend Matthew Hussey.
The ‘Havana’ singer even tweeted about the funny pics.
The singer also opened up about being back in the studio, and if she'll be releasing new music before the upcoming 51-stop tour.
Some on social media are accusing Swift of taking a little too much inspiration from a 2016 fragrance commercial directed by Jonze.
The 21-year-old singer opened up about joining the Reputation tour while speaking with ET at the 2018 iHeartRadio Music Awards.
The 'Havana' singer spoke with ET at the 2018 iHeartRadio Music Awards and explained why she's excited to hit the road with Swift for her 'Reputation Stadium Tour.'
