The pop star presented the award for Best Musica Ubana Album in ... Kayla Oaddams/WireImage Christina Aguilera knows how to make an entrance. The "Genie in a Bottle" singer, 43, hit the stage ...

have shocked guitar fans by handing the best single prize to pop queen Christina Aguilera. The singer, who took the award for Dirrty, is one of the few pop acts to be nominated for an award.