The 'Come and Get It' hitmaker, who has an on-off relationship with Justin Bieber, is gearing up to celebrate her 21st birthday on July 22, reported Contactmusic.
"I feel like sometimes I am 15 in my heart. You know, sometimes I just go in waves of being a child and being an adult. It's awkward, I am growing up. I am just trying to figure out who I am," Gomez said.
But the 'Spring Breakers' actress is looking forward to celebrating the milestone in Los Angeles next month and being legally able to drink alcohol.