Which music artist's endorsement deal resulted in the largest percentage increase in sales for a musical instrument in the 2010s?

The partnership between musicians and brands has created some of the most iconic marketing moments in history. These endorsement deals not only boost product sales but can define an artist's image and expand their reach beyond music. From signature instruments to lifestyle products, these collaborations represent carefully calculated brand alignments that benefit both parties. Test your knowledge of some of the most impactful and surprising musician endorsements that changed the marketing landscape.

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Taylor Swift's partnership with Korg for their digital pianos (62% increase)
Ed Sheeran's signature Martin guitars (85% increase)
Billie Eilish's collaboration with Fender for custom ukuleles (57% increase)
Post Malone's limited edition Gibson guitars (73% increase)