Pixel Perfect (2004) on Netflix

Plot summary

Roscoe wants to help his friend Samantha, whose band, the Zettabytes, cannot draw a crowd. Samantha sings and plays guitar, but she is told the group needs a dancer to succeed. With his father's holographic technology, Roscoe creates Loretta, a humanoid hologram who can dance with the band. At the group's first show, a school dance, Loretta wins the audience over. Everyone in the band is delighted with her except Samantha, who feels shut out and jealous. Samantha agrees to look after Loretta and keep her hidden from Roscoe's father, who would delete the program if he found it.