The bat landed on Momsen’s leg during the song Witches Burn on Wednesday night as her rock group, The Pretty Reckless, was opening for AC/DC in the Spanish city of Seville.
Momsen, who is most known for playing Jenny Humphrey in Gossip Girl, asked the fans what they were looking at before realizing what they were pointing at.
“There’s a f***ing flying bat on my leg right now; can someone help me please?” Calmly, she spoke into the microphone.
Her calm response was noticed; a concertgoer can be heard in the audience muttering in Spanish, “very professional.”
Momsen remarked, “I must really be a witch,” as her bandmates and backstage crew looked on.