Conversation so far:
Did Janis preform at WoodStock?
Joplin appeared at Woodstock starting at approximately 2:00 a.m., on Sunday, August 17, 1969.
Was this performance a success?
Joplin was ultimately unhappy with her performance, however, and blamed Caserta.
Why did she blame Caserta for her performance?
Faced with a ten-hour wait after arriving at the backstage area, Joplin shot heroin and drank alcohol with Caserta.
What was her relationship with Caserta?
CANNOTANSWER.
How did she feel about performing at WoodStock?
Joplin saw the enormous crowd, she instantly became extremely nervous and giddy.
Did she have any personal supporters with her when she went to Woodstock?
the pregnant Joan Baez and Baez's mother.
Did she perform with any other famous people at woodstock?
Joplin was among many Woodstock performers who stood in a circle behind Crosby, Stills & Nash during their performance.
Are there any other interesting aspects about this article?
Her singing was not included (by her own insistence) in the 1970 documentary film or the soundtrack for Woodstock: Music from the Original Soundtrack and More.

Question: Was her singing not included because she was not happy with her performance at woodstock?
Self-contained rewrite: Was Janis Joplin's singing not included because she was not happy with her performance at woodstock?