1. But the signature tune proved popular for another reason after the performance stirred up heated discussion about copyright protection.
2. The infectious South Korean tune and other international hits have reshaped the city's most popular hobby and are gradually replacing traditional Chinese songs.
3. But Doudou's subsequent singing of the song with her child's voice also became a popular version of the tune.
4. If you have heard a popular tune sometime in the past year or two, you will likely hear it here.