Connee Boswell was a popular and successful vocalist of the late 1930s through the 1970s. In the early 1930s, she and her sisters, Martha and Vet, formed a singing group, appropriately known as The Boswell Sisters. They were known for their harmonizing and jazz vocals.
When Connee's sisters retired in the mid-1930s, Connee continued on her own. However, I still prefer her and her sisters singing together.
In the late 1980s, I purchased the autograph shown below, for about $3. It's on an autograph album page, to which the original owner attached a tiny newspaper photo of Connee.
Here's a much nicer photo of Connee.
There is a group of devotees of The Boswell Sisters, and they have a website which I recommend visiting.
Here's a tv movie from 1952 of Connee singing in her New York City apartment.
Here's a video of The Boswell Sisters from a 1932 movie, with Connee on the left.