<human>: Kimberly Sue Yap Chiu (born April 19, 1990), commonly known as Kim Chiu, is a Chinese Filipino actress, singer and television host in the Philippines. Chiu first starred in the television series, Sana Maulit Muli (2007) which won her the year's Most Promising Female Star at GMMSF. This followed by a string of successful projects and leading roles in dramas such as the Philippine adaptation of My Girl (2008), action-melodramas Tayong Dalawa (2009), Kung Tayo'y Magkakalayo (2010), rom-com My Binondo Girl (2011-2012), family drama Ina, Kapatid, Anak (2012-2013) and period drama Ikaw Lamang (2014).

Chiu gained prominence by winning the reality series Pinoy Big Brother: Teen Edition. For the show, Chiu left her hometown of Cebu City and moved to Manila. She, along with the rest of the housemates entered the Big Brother house on April 23, 2006. After 42 days in the Big Brother house, she was named the Teen Big Winner with 626,562 votes (41.4% of the total votes) at the Aliw Theatre inside the Cultural Center of the Philippines Complex in Pasay City. She was the only housemate who was never nominated for eviction.  After winning, Chiu became part of Star Magic. She and her on-screen partner Gerald Anderson became regulars in ASAP XV and appeared together in several ABS-CBN shows Love Spell, comedy sitcom Aalog-Alog and in the film First Day High.  In 2007, Chiu starred in the primetime TV series entitled Sana Maulit Muli alongside Anderson which was released to significant acclaim. That year, she was nominated and eventually won the 38th Guillermo Mendoza Box Office Awards as Most Promising Female Star and Best New Female TV Personality (for Sana Maulit Muli) at the 21st PMPC Star Awards. Sana Maulit Muli was later released in Taiwan under the PTS network, under the title Chances.  Chiu then launched her debut album Gwa Ai Di (Wo Ai Ni ; Minnan, "I Love You") under Star Records, which included the single Crazy Love. It reached a Gold Record status.  Gaining much recognition for her acting roles, she then starred in the movie I've Fallen For You under Star Cinema and continually appeared in numerous advertisements. In 2008, Chiu was cast in the Philippine adaptation of the South Korean TV series My Girl. CANNOTANSWER

Using a quote from the above article, answer the following question: what was her biggest success at this time?
<bot>: she was nominated and eventually won the 38th Guillermo Mendoza Box Office Awards