Conversation so far:
What happened in 1935 during Billie Holiday's career?
In 1935, Billie Holiday had a small role as a woman abused by her lover in Duke Ellington's musical short film Symphony in Black: A Rhapsody of Negro Life.
What happened with Billie Holiday's career in 1936?
Billie Holiday's tunes included I Must Have That Man, Travelin' All Alone, I Can't Get Started, and Summertime, a hit for Holiday in 1936.
What happened with Billie Holiday in 1937?
In late 1937, Billie Holiday had a brief stint as a big-band vocalist with Count Basie.

Question: What happened in 1938?
Self-contained rewrite: What happened in 1938 that was important for Billie Holiday?