The 16-year-old American Idol runner-up said that drastically changing her eating habits meant that she was able to shed the pounds in such a short amount of time.
"Changing my diet was the big thing. I had to learn correct portion control," Alaina explained to US Weekly.
"I eat an egg-white omelette for breakfast, shrimp and veggies for lunch and chicken with asparagus for dinner. I'm 10 pounds from my goal - almost there! I wear size small and extra-small now!"
Alaina previously confessed that she used to make herself sick over weight issues, saying: "Sometimes it would swallow me up. I would compare myself to those other girls to the point where it would make me sick, because I'm not like heavy, heavy, but I'm not the skinniest girl in the world."
She has said that her successful career following American Idol has made her "grow up" faster than other kids her age.
Watch Lauren Alaina's video for 'Like My Mother Does' below: