ALIEN, THE Easter Egg - Star Wars Max Rebo Band Reference

Page 36. Jack is talking to Amy, and he asks what she's listening to on her walkman.
She replies, "Maxar."

If you say it, it sounds like 'Max R.' which is the last initial of Max Rebo, the blue elephant keyboard player in Jabba the Hutt's palace in "Star Wars Episode VI: Return of the Jedi".
Amy says she likes Max because she likes keyboard artists.

Jack says that he thinks "Sy has the sexiest legs."
This is a reference to Sy Snootles, the lead singer of the Max Rebo Band.