Many believed Steven Tyler might never perform again, but he has since made a few surprise appearances. On July 5th, he took the stage at the 'Back to the Beginning' Black Sabbath farewell concert in Birmingham,

Black Sabbath's farewell concert, which included hits like "Iron Man" and "War Pigs," comes as the rocker is living with Parkinson's disease.

The original lineup of Black Sabbath reunited for the first time in 20 years on Saturday in the U.K. — and for the last time ever, since the performance was also billed as the final concert ever ...