Why did pop stars withdraw from Spring Festival Gala?Because

Why did pop stars withdraw from Spring Festival Gala?Because they are “being busy” or they have
Huang Xiaoming,one of the singers of the opening song,has decided to withdraw from CCTV Spring Festival Gala,which makes him another pop star after Chen Kun who had declared to leave.The reasons that these two pop stars withdrew are the same---“too busy”,however,the net friends don’t seem to believe,many people believe that the reason they have to leave is that they are not able to sing live in the Spring Festival Gala because of their poor singing skill.Anyway,it is better for these pop stars to withdraw because of “being busy” than to be laughed at by the audience for their poor singing skill.What do you think?