The 27-year-old 'Bubbly' hitmaker was forced to halt a show at Pittsburgh, Pennsylvania after she was attacked onstage by bugs, reported Contactmusic.
Caillat was performing her hit 'Bubbly' at the outdoor concert when suddenly she freaked out.
The singer stopped singing and told her fans, "I am so sorry but this is really scary. Sorry, but I don't know if I can keep singing you guys. Can I go?".
She stepped away from the microphone and waited for the bugs to fly away before continuing with the show.
"I am traumatised from the bazillion bugs that were literally raining on me from the sky while singing on stage in Pittsburgh on Tuesday!!", Caillat later wrote on her Facebook page.
