Sandara Park made her debut in 2004 with ABS-CBN's Star Circle Quest. Sandara has reinvented the beauty-queen wave (with only the hand, not the arm, moving like that of a mechanical doll). She made Philippine history by garnering approximately 500,000 text votes, making her the first female to garner that much SMS support. And so she remained until the final night when she was announced runner-up to Hero Angeles. It is estimated that she got at least 2,000,000 accumulated SMS votes from supporters during the entire run of the contest.
She surprised everybody during the Final's Night.
She had several commercial endorsements for personal care and food products.
Her first T.V. Philippine show was Sandara's Romance.
In addition, Sandara also embarked on a musical career that eventually led to the release of her self-titled 6-track album which spawned the novelty dance hits "In Or Out," a song that parodied her experiences on Star Circle Quest, and "Walang Sabit," the jingle for Rejoice Shampoo.
As proof of Sandara's rapid rising-star status, the album was Certified Double Platinum after 6 months.Sandara also appeared in four movies - Bcuz of U, a three-storyline movie which co-starred other prominent local actors, Can This Be Love, which grossed P 99,000,000 in the box office, D' Lucky Ones and Super Noypi, a Filipino fantasy film and an official entry to 32nd Metro Manila Film Festival.
Sandara left the Philippines and returned to South Korea on August 1, 2007  with her mother and siblings to begin a new life. The next day, August 2, 2007, YG Entertainment reported that they had signed a contract with Sandara
2NE1  was much anticipated by the fans of YG Entertainment. Sandara and 2NE1 gained popularity both through the commercial and the music video of the song "Lollipop" and their debut became a hot topic. On May 6, 2009, two versions of their debut song "Fire"'s Music Video were released, igniting the fire that would spread throughout the Kpop world. 2NE1 performed their debut stage on May 17th on SBS Inkigayo. Their song "Fire" topped charts for weeks, and 2NE1 hit the top spot again with their song "I Don't Care" from their first mini-album. The song was released on July 1, 2009 and hit number one on the charts the same day.
She sang the "In or Out" in Korea