1. Un Perai Sonnale from Dum Dum Dum The hit number is still ruling the playlist of lovers and Karthik Raja fans. It's also considered one of the best works of singer Unni Krishnan. 
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Happy Birthday Karthik Raja: 10 nostalgic songs that define the talented composer 

It's Karthik Raja's birthday and we decided to present you the most interesting and unforgettable songs of the composer 

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2. Kaasumela from Kaathala Kaathala Even today, a party isn't complete without playing this song. The song got a wider-reach because of the lead actors' effortlessly elegant dance moves.
3. Ennulle Ennulle from Valli This film marked the full-fledged musical debut of Karthik Raja. The song is so soothing and perfect that many assume that it was composed by the senior Raja.
4. Veesum Kaatrukku from Ullasam This beautiful melody was ahead of its time and it enhanced the 'lover boy' image of Vikram during the time of the film's release.
5. Indha Sirippinai from Naam Iruvar Namakku Iruvar The melody number from the Sundar C directorial showcases the romantic side of Prabhudheva and the video is still played regularly in music channels
6. Chellame Chellam from Album This slow, yet mesmerising song became the visiting card of the film during its release, and interestingly, this film marked the debut of director Vasantha Balan.
7. Meiyanadha from Three Roses The high-spirited song was so good that Bollywood star Govinda agreed to do a special dance number for it.
8. Kavithaikal Sollava from Ullam Kollai Poguthae This song is considered one of the best pathos numbers of the early 2000s, and surprisingly, the film was helmed by Sundar C.
9. Adiye Kiliye from Kudaikul Mazhai The song rendered by Ilaiyaraaja is one of the under-rated melodies of Karthik Raja.
10. Paarthu Po from Neranja Manasu This quirky and fun song features the heroine Susan dancing around a bike ridden by blind-folded Vijaykanth. Yes, you heard that right!

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