Sorry Nancy Sinatra -- but these boots were NOT made for walking.
The always outrageous Lady Gaga - wearing massive platform boots - tripped and fell at Heathrow Airport in London Wednesday morning, and RadarOnline.com has the pics - blow-by-blow.
The Poker Face singer had just flown into London from New York City when she lost her footing.
Fortunately, she wasn't bruised -- other than her pride possibly.
Although she's in Europe, Lady Gaga is currently on tour in the U.S. She performs next in Boston on July 1.