WATCH: PJ Powers' extraordinary tribute to Joost

PJ Powers united South Africans during the 1995 world cup with her performance of World in Union and she brought the house down at the memorial service for Joost van der Westhuizen on Friday.

Tears flowed as PJ's signature voice boomed at Loftus in Pretoria.

The song came just moments after Joost's estranged wife, Amor Vittone gave an emotional speech about her first love.

Watch the powerful performance above.

PJ Powers on stage #Joostpic.twitter.com/JCSUcgDytC

— Abigail Javier (@AbigailJavier_) February 10, 2017