What are some pop songs in Chinese tunes and what are some in Western tunes.

Pop songs that use classical Chinese instruments such as the erhu and pipa, or have lyrics that relate to traditional Chinese culture, or include elements of Chinese opera are in the Chinese key, such as Li Yuchun's "Sichuan Embroidery" and Jay Chou's "Blue and White Porcelain," among others.

Similarly, songs played on Western instruments, perhaps including American country songs, blues, and jazz are Western tunes