All that can presently (June 2024) be gleaned about Baby Dimples from sheet music covers and by Internet searching is that she was presumably an American actress/singer who has been featured on just one work namely Oh! You Cuddlesome Baby (1918) music by Dick Heinrich, words by Christ Pender and published by A.J. Stasny Music Co., New York, USA
Her portrait on the left is taken from that same work.
Surfers are welcome to contribute any further information about this performer.