April 21 (UPI) -- American pop music icon Madonna said a vintage costume she wore during her surprise performance last week at Coachella has gone missing and she is offering a reward for its safe return.

The Queen of Pop performed Friday night with Sabrina Carpenter at the Coachella Valley Music and Arts Festival in Indio, Calif.

In an Instagram story on Monday, Madonna revealed that vintage pieces show she wore during the set had gone missing.

The missing pieces include a jacket, corset, dress and "all other garments," she said, adding that they were taken from her personal archives.

"These aren't just clothes, they are part of my history," she said.