United Kingdom, April 21 -- Madonna is offering a reward for the return of the costume she wore for her performance with Sabrina Carpenter at Coachella.

The 67-year-old pop superstar took to the stage for a surprise appearance during Sabrina's set at the Coachella Valley Music and Arts Festival in Indio, California on Friday (17.04.26) wearing a purple corset with a jacket and knee-high boots. However, Madonna has now revealed the items - which were pulled from her "personal archives" - have since disappeared and she's desperate to get them back.

In a post on Instagram, she wrote: "Still flying high since Friday night at Coachella! Thank you to Sabrina and everyone who made it possible ...

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