Gomez said Aniston has always been her acting idols and the awkward encounter is one of the most embarrassing moments of her life, reported Contactmusic.
"I ran away from Jennifer Aniston when she said, 'Hi'. I was terrified of her. I was scared, so I ran away and I'm really embarrassed about that," Gomez said.
Meanwhile, the 20-year-old, who split from 'Baby' singer Justin Bieber last year, has insisted that her new single, 'Come and Get It', is not about her former boyfriend.
"It's not really about a specific person... It exudes confidence and strength and that is something I'm willing to share with the world. I want to represent something good and be a good example."