Chalermchaichareonkij loves to sing since he was young and tried to participate in many singing contests. He won and failed times to times until he was most successful in UBC Academy Fantasia Season 2, the most popular reality show in Thailand. Chalermchaichareonkij became the winner of UBC AF Season 2 with the highest popular vote from audience across the country. It was claimed that he won all hearts because of his friendly personality and his talents in Thai country (Luk Tung) songs, which he had just practiced one year before joining the contest. Apart from Luk Tung, Chalermchaichareonkij can also sing very well in other styles, pop, rock, hip-hop, etc. He is also well-known from the title Krarok Noi (Little Squirrel), which is named by his trainer from the show based on his personality.

After winning the reality show, Chalermchaichareonkij and all UBCAF II contestants released an album called Ray Khai Fun (Dream for Sale) with UBC Fantasia (Now called True Fantasia) in October 2005, following with his debut solo album Show Aof in March 2006. The album contains various styles of music including pop, hip-hop and Luk Tung, but the pop song called Plian Jai Noi Dai Mai (Could you change your mind?) can climb up to No. 1 in the SEED Chart Top 20 of 97.5 SEED F.M which is broadcast to all fans nationwide for three weeks as well as remaining No.1 in lots of radio charts across the country.

In October 2006, UBCAF I and UBCAF II contestants released an all-star album called Dream Team together and Chalermchaichareonkij can show his talent in Luk Tung songs again in the song Hua Jai Wang Wang (The Single Man’s Heart), the only Luk Tung song in the album.

After the first solo album and the all-star album, Chalermchaichareonkij has realized that he would like to entertain his fans from all ages and he is most happy when he sings Luk Tung songs. Therefore, his second solo album appears to be pure Luk Tung songs instead of a combination of pop music and Luk Tung as in the first album. It is even more special because there are 4 Luk Tung super stars, including Arphaporn Nakhonsawan, Pornchita Na Songkhla, Pamela Bowden and Luk Nok Supaporn, to join and feature in this album. The song Rak Thon Rak Nan (Enduring Love, Lasting Love) featured by all four Luk Tung super stars, which is also the name of this album, can go to no. 1 for 6 weeks in T-Top chart which is ranked by T-Channel, the most popular cable Luk Tung music station in Thailand. 500,000 copies of this album were sold and Chalermchaichareonkij was well-known among Luk Tung audience.

In December 2007, he was invited to join in a special show in Just the Two of Us, the most popular reality show on Hunan TV in China, to promote Luk Tung songs.

In 2009, Chalermchaichareonkij released another album “Su Kho Sa Mo Sorn” with Nim from True AF 5. This album recovered popular songs in the past and included only one new song “Phu Chai Ngai Ngai”. Chalermchaichareonkij released an album “Rue Doo Hang Kwam Rak” again in early 2010 from a cooperation of True Fantasia and Sure Audio and another two singles “Khad Kwan Aob Aun Yang Rang” and “Roy Yim Peun Nam Ta” in late 2010 with other AF winners from Season 1-6.

Besides these albums, Chalermchaichareonkij also starred in drama series and movies. In October 2010, the contract with True Fantasia was expired and now Chalermchareonkij signs a 5-year contract with Grammy Gold.