Nelson Mandela's Birthday and Em is invited?

The poster boy for Anti-Apartheid turns 90 on July 18. Nelson Mandela who spent 27 years imprisoned for resisting white minority rule before serving as South Africa's president from 94'-99' has organized in conjunction with his AIDS charity "46664" (His old prison number) a concert in London's Hyde Park. The Concert will be held on the 27th and will be hosted by the "Fresh Prince" and his Wife Jada Pinkett-Smith. Eminem had been asked and confirmed to preform as well as Stevie Wonder, Annie Lennox and Razorlight. U2, The Spice Girls and Paul McCartney have also been asked to preform.
"This year's birthday celebrations aim to celebrate Mandela's ideas rather than just the man" said the chief executive of the Nelson Mandela Foundation, Achmat Dangor.

This will probably be one of the biggest charity and music events of the year, but I really don't get why they would invite Em of all people? Not that I don't like the guy but I mean he's not exactly one the acts that come to mind when you say charity or AIDS. U2 obviously Stevie for sure but Em? Oh and not mention that Will Smith and Eminem exchanged words a couple years ago. It would be hilarious if Will took a shot at Em after he preformed... Personally I think this is just Em being your typical white guy after being called a racist, "I've have tons of black friends...SEE"