Camila Cabello of Fifth Harmony apologized to her fans after she unexpectedly left the group's 7/27 Tour concert in St. Louis, Missouri, on Friday. According to the singer, she decided to leave the concert due to her anxiety issues.

As reported by the St. Louis Post-Dispatch, Cabello left the stage shortly after Fifth Harmony performed their 2015 hit "BO$$" from the album Reflection. As a result of her departure, the other four members Ally Brooke, Normani Kordei, Dinah Jane and Lauren Jauregui were forced to go through their remaining set without Cabello.

One of the members of Fifth Harmony said that the singer stepped off the stage due to a wardrobe malfunction. This was clarified by Cabello on Saturday when she apologized to her fans through her Snapchat Story.

 Camila's Snapchat Story (September 3rd). #camilacabello #fifthharmony

A photo posted by Camila Cabello Snapchat (@camilasnap) on Sep 3, 2016 at 10:01am PDT

As noted by Billboard, Cabello has been having anxiety problems since last year. According to the singer, she was able to keep her condition at bay through stress-relieving techniques.

"I was having terrible anxiety, nonstop," she told the entertainment news site. "My heart would beat really fast the whole day. Two hours after I woke up, I'd need a nap because my body was so hyperactive."

"I was scared of what would happen to me, of the things my brain might tell me," Cabello continued. "I realized the stuff I thought was important isn't worth my health. Now I write in a diary every day, work out and meditate."