PHOTOS: Michael and Janet Jackson
According to the BBC, the multi-million-dollar act had to cancel their performance because of "unavoidable circumstances." The news comes as a shock as we know fans across the globe, those particularly in Wales, are probably upset.
But fans shouldn't be too upset -- the night's lineup still looks promising, with Jamie Foxx scheduled to host with Christina Aguilera, Ne-Yo, Leona Lewis and Cee Lo Green all set to take the stage. In addition, Beyonce is scheduled to share a special video contribution.
PHOTOS: Ladies in Michael Jackson's Life
Katherine Jackson and Michael's three kids; Paris, Prince and Blanket, will all be in attendance.
Don't forget the entire concert will stream live on Facebook.