Fifth Harmony found themselves performing as Fourth Harmony on Friday night in St. Louis, Missouri, after Camila Cabello left the group's set mid-concert.
According to St. Louis Post-Dispatch, Cabello left the stage shortly after performing "Bo$$," despite having seven songs left in their set.
While the local news outlet reported that one of Cabello's group mates told concertgoers that she had experienced a "wardrobe malfunction," the 19-year-old singer never returned to the stage.
Cabello later took to Snapchat to apologize to fans, attributing her absence to "anxiety."
"Hi Missouri, sorry I couldn’t finish the set last night," she wrote. "Was having too much anxiety and couldn't finish it."
"I love u. I'm truly sorry," she added.
The Cuban-born singer also expressed her tiredness shortly before the group hit the stage at the Hollywood Casino Amphitheatre.
"Just wanna sleep for 3 days," she tweeted.
just wanna sleep for 3 days— Camila Cabello (@camilacabello97) September 3, 2016
While rumors have swirled in recent months that Cabello might be leaving the group to pursue individual projects, the band insists they're sticking together.
"Regardless of everything that’s been going on, that's always been the focus, Fifth Harmony," Dinah Jane told ET. "Fifth Harmony is definitely our first love… it's always been the foundation of everything."
See more in the video below.