This is an image of the cover page of a piece of sheet music from a show and was copyrighted by the publisher in 1926 and is now in the public domain. It is believed that the use of this cropped, low-resolution image to illustrate the show in question, qualifies as fair use. The source of the image is my personal sheet music collection.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.