They Called it Amnesia

Kayla is her Earth name. SX2795 is her clone name. She is cloned both from the DNA of the abducted Earthling Kayla and the alien Queen. She was the first sent from planet Nerogiea to learn of the Earthling's lifestyle . On the way to Earth, her spacecraft crashed and caused damage to her clone body. She has forgotten her mission and her true identity.
Lydia is your everyday teenage girl. Her life is filled with boys and parties. When she meets Kayla her world is turned upside down. She discovers things she never imagined could be true.
As Kayla's memories return the two discover there are more like her on Earth. Then the battle truly begins.