WATCH: 'Vavi likes sex' - Anti-Vavi delegates sing

Crowds chanted anti-Vavi slogans as the Cosatu congress was set to begin. Hundreds of delegates arrived at the Gallagher Estate in Midrand, where the Cosatu special national congress is taking place. 

Delegates danced and sang, "uVavi uthanda iwewe" [Vavi likes sex].

Zwelinzima Vavi tweeted in response: 

Wow sickening low level politics - but did they say he is worst than who? https://t.co/B0pMXkxEB7

— Zwelinzima Vavi (@Zwelinzima1) July 13, 2015

Nine trade unions loyal to expelled Cosatu general secretary Zwelinzima Vavi are in attendance.