Lyricist Kumaar, who wrote the King song 'Tu Mil Jaaye', opened up about SRK's collaborative process and how the superstar ensures track lyrics match his evolving star power and age. Lyricist Kumaar emphasizes that Shah Rukh Khan, at 61, ensures his songs reflect his age, as seen in Tu Mil Jaaye from the film King. Lyricist Kumaar has shared insights into the musical world of Shah Rukh Khan's upcoming film 'King'.