Louis Armstrong & Ella Fitzgerald singing Dream a Little Dream of Me (Also here: ♫ http://blip.fm/~5o9mw)

Also this version from 1967 by Mama Cass Eliot.

Leave you with two more gems from Louis & Ella

and this featuring Ella alone - singing Gershwins "Summertime" at a concert in Berlin/Germany

Also this Billie Holiday version of Summertime.