It is a diminutive of star. It is the name of a very old children's song (author Manuel M. Ponce, Mexican, 1912). It is the common name of a garden, herbaceous plant that produces many flowers and assorted colors (scientific name Pentas lanceolata of the Rubiaceae family). There are two other plants with the same common name of estrellita: Eryngium carlinae, of the family Apiaceae, which in Mexico say you Hedgehog. It is a plant of arvense. The other plant is the Parietaria judaica of the Urticaceae family that grows in old walls. Estrellita is also a woman's name. Name of a Mexican fighter, an actress and Spanish singer (Estrellita Castro).