With a long list of hit songs, including "Sandese aate hain", "Abhi mujh main kahin", "Aal izz well" and "Zoobi doobi", the 39-year-old believes that after a point singing is not about fame, but achieving milestones."There is no end to music, you can keep exploring, and there is never an end to it. After a point you don’t work for money or fame, you work for milestones. Like 'Kal ho naa ho', 'Main hoon na' have become the biggest milestones," Sonu told IANS.
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