July 12, 2011 - Hannes Magerstaedt/Getty Images Europe more pics like this »
Christina Aguilera

If all goes to plan, 75,000 people will pack Wales Millennium Stadium in Cardiff to see Michael Jackson's tribute concert. One of the many artists signed on is Christina Aguilera. With the event held overseas, the pop star won't have to sing the national anthem, meaning she may actually put on a great show.