Sing a song(唱首歌) 6.Sing a song(唱首歌) Sing S song(唱歌歌) Sing a song (唱首歌) Sing a song(唱首歌儿) Sing a song唱一首歌 6.Sing A Song(唱首歌) Sing a song (唱首歌儿) sing a song Sing a song (来唱歌)