The jazz pianist/composer Hank Jones has died at age 91 at a New York City hospital Sunday night following a brief illness... His 70-year career includes having worked as Ella Fitzgerald's pianist. He also is a footnote in U. S. Presidential history since he was Marilyn Monroe's accompanist when she sang "Happy Birthday" to President John F. Kennedy. Jones won a Grammy Lifetime Achievement Award in 2009 as well as being a recipient of the National Medal of Arts given to him by President George W. Bush in 2008. Check out all the details here from the Associated Press article.
Footnote in U. S.History...Here is Hank's performance with Miss Monroe:
Hank Jones playing solo at Carnegie Hall 1994: