In an Instagram post about her first appearance at Coachella since 2006, Madonna said that the vintage costume she wore on stage is missing and that she's offering a reward. 

"I discovered that the vintage pieces that I wore went missing," the pop star wrote. She said the items included her jacket, corset, dress was "pulled from my personal archives."

"These aren't just clothes, they are part of my history," Madonna posted Tuesday, after her surprise set with Sabrina Carpenter. 

The Indio Police Department told TMZ that the items were last seen on a golf cart on the Empire Polo Grounds on April 18. 

Madonna's post includes an email for anyone to send tips as to where she can locate the missing clothing. She said she's offering a reward for their safe return.