Rethabile Kgoroeadira and Thubalethu Myeni were the first contestants to be eliminated from the Idols through votes by viewers.
The two hopefuls were eliminated on Monday because they received less public votes following Sunday's performance.
Viewers voted for 24 hours since Sunday's performance where some contestants impressed judges. Kgoroeadira, 20, of Johannesburg on Sunday performed Army Whitehouse's song Rehab and judges were impressed.
Judge Randall Abraham said her performance was very natural, but that the singing was not that great.
Myeni of Port Elizabeth, who sang the Phil Collins ballad, You'll Be In My Heart, gave a good performance but judges felt he was too comfortable.
After saying goodbye to Myeni and Kgoroeadira, Suzzi Heerman and Jason Dean Hartman were still in the hot seat and could not believe what had just happened.
This Sunday, the remaining Top 12 will perform again in the final Studio Round and next Monday the fans will send two more performers home.
The Top 10 finalists will perform in front of thousands of fans at the Teatro at Mosaic, Johannesburg.
For the first time in the history of South African Idols, the voting public will have a 100 percent say in determining who is going to win, while in past seasons the judges opinions were taken into consideration.