In 1984, Aguilar entered the Miss Thailand pageant under the name Treejinda Aguilarsakul (Thai: ตรีจินดา อากีลาสกุล) and was among the top 30 finalists, ultimately losing to Savinee Pakaranang.

The turning point in her career was when she met Rewat Bhuddhinan, then chief producer for GMM Grammy, who enticed her into the music industry.

It was followed by the release of some other pop dance singles, including "Plik Lock (พลิกล็อค)" and "Prawatsart (ประวัติศาสตร์)", and some ballads, like "Hua Jai Kor Ma (หัวใจขอมา)" and "Plao Rok Na (เปล่าหรอกนะ)".

One is the dance single "Mai Yag Rok (ไม่อยากหรอก)" and the other is the love ballad "Rak Thur Thee Sood (รักเธอที่สุด)".

A year later, she was one of five guests of Thailand's most successful singer, Thongchai McIntyre, in the album Khon Nok Gub Dok Mai (Feather and Flowers).

In the same year, with other five popular Thai artists at that time, Jetrin Wattanasin, Patipan Pataweekarn, Tata Young, UHT, and Myria Benedetti, she was included on the album 6-2-12.

The album spawned hits such as "Ya Mong Trong Nan (อย่ามองตรงนั้น)", "Fak Kwam Yin Dee (ฝากความยินดี)", "Mai Tong Khob Jai (ไม่ต้องขอบใจ)", "Tai Pa Hom Oun (ใต้ผ้าห่มอุ่น)" and the gay anthem "Pood Eek Thee (พูดอีกที)".

The album features Sarah Jane Fearnley (also known as Fearn), an English singer who sang backup for Spice Girls and on the soundtrack of the movie Evita.

It spawned three singles: "Sawan Yoo Thee Jai (สวรรค์อยู่ที่ใจ)", "Hong Derm (ห้องเดิม)", and "Yak Fung Kum Nun Talod Pai (อยากฟังคำนั้นตลอดไป)".

Four years later, Aguilar released her eighth album C.Space, featuring singles "Koh Khoom Laew", "An Everlasting Love", and "Wang Meed Dai Rue Yung".

In 2010, Aguilar performed with various artists, including Tata Young, Mai Charoenpura, Marsha, Jetrin Wattanasin, and Dan, on a special project called "This Is It, the Concert", a tribute to Michael Jackson, after his death in 2009.

[9] In 2016, at the "Million Albums Concert" (คอนเสิร์ตล้านตลับ), she performed with various artists including Tata Young, Mai Charoenpura, Myria Benedetti, Beau Sunita, and Nicole Theriault on 7–9 October 2016 at Royal Paragon Hall.

In 2024, Aguilar reunited with Bird Thongchai for the special EP "Khon Nok Kab Dok Mai: Dream For Love."

She performed two songs, "Rak Ter Tao Rai" and "Lao Soo Kan Fang," alongside Bird Thongchai, Mai Charoenpura, Poo Anchalee, and Lydia.