Lena Horne Singing Genres?

Hey, writing a report on Lena horne but I cant seem to find out how
many genres or styles of singing she had... there was jazz but from
what I've read it isn't clear if she went into bebop or another
modern(er) type of singing.

Thanks

-Any other usefully information about her would be greatly
appreciated, something with a link to back-up your claim would be even
better-