Lalaine's road to stardom began when she was she was hanging out with Nikki Alberto and she found a job at the Broadway production of Les Miserables. In it, she played Eponine, a character that has also been played by Debbie Gibson among others.
When Lalaine returned to California, she was able to act in several television commercials, including some of those for Microsoft and Burger King. She also participated in a theater play in her home state, called Brundibar.
Lalaine's voice has been used for many movies, including Inspector Gadget and Lolita. She also played orphan Kate in the Disney Channel version of the movie Annie. She starred alongside AJ Trauth in the Disney Channel original movie "You Wish" as Abby. Lalaine also portrayed Chloe, a young Slayer-In-Training who commits suicide, on the hit TV-Series "Buffy the Vampire Slayer." She also acted with Lindsay Lohan in Get a Clue.
In addition to her acting career, Lalaine is involved in many charity events, such as the AIDS benefit concert and NSYNC's challenge for the youth.
On July 8, 2003, Lalaine released her new independent album,"Lalaine:Inside Story". Lalaine wrote six songs on the album herself, including "Life is good","Can't Stop", and "Save Myself". She has been working with Radio Disney, performing her songs all over Southern California, and went to Hawaii with Disney's Imagineers. For six months Lalaine's song "You Wish", written for the movie of the same name, was in the Top 30 Radio Disney songs.