Twi'lek

Twi'leks were a humanoid species whose most striking features included colorful skin, which varied in pigment from individual to individual, and a pair of tentacles that grew from the back of their heads. They could be found everywhere from Tatooine to the halls of the Galactic Senate on Coruscant, and followed every career path from a dancer to Jedi Council member.

In the official films
The first two Twi'leks, Bib Fortuna and Oola, appeared in Return of the Jedi, and several others have appeared in the subsequent prequel trilogy. Twi'leks have since become the go-to alien species for sexy females.