Drew was sent home last night after a sing-off with Marcus Canty, following Astro's departure in the double elimination.
After the show, Justin, 17, tweeted to her: 'Keep your head up. I lost my first competition too. this is just the beginning for u. never say never. best wishes.'
Ryniewicz has admitted to being a big fan of the Canadian pop star, and wowed the judges with her twist on his Baby track in her first audition.
The remaining acts fighting for the X Factor prize of a $5 million recording contract are Melanie Amaro, Josh Krajcik, Rachel Crow, Marcus Canty and Chris Rene.