The Eighties icon grabbed a microphone and led a sing-along of her hits, including Girls Just Wanna have Fun – and worries about lost time quickly disappeared.
Cyndi – in Argentina on her world tour – tweeted about the situation.
"Ok, so chow Argentina," she wrote. "At airport … So many delays.
"Wound up being announced, wound up singing two songs for airport. A first for me. Crazy day."