To cheer up peeved passengers at the Buenos Aires' Jorge Newbery Airport, she grabbed a public-address microphone and belted out her 1983 hit song "Girls Just Want to Have Fun." Travelers and airport workers sang along.
A video of the spontaneous performance was recorded Friday, and has attracted thousands of views since it was posted to the Internet.
The pop star is on tour and was traveling from Argentina to Chile when several flights were delayed due to an extended holiday weekend.
The Associated Press contributed to this report.