Image credit: Aguilera: Dave Hogan/Mission/WireImage.com; Timberlake: James Devaney/WireImage.com
Why did Christina Aguilera's ''Dirrty'' get a nomination for Best Pop Collaboration, while Justin Timberlake's ''Like I Love You'' got one for Best Rap/Sung Collaboration?Both pop confections include just a single rapped verse. But the screening committee of 150 music-industry experts charged with category policing somehow determined that ''Dirrty'' (with Redman) had ''more pop vocal elements than rap,'' says Grammy spokesman Ron Roecker, while the opposite was true of ''Like I Love You'' (featuring Clipse). Roecker says it was probably the artists' labels who originally chose those categories. In any case, the decision pits Timberlake against such hip-hop fare as Fat Joe/Ashanti's ''What's Luv'' and Nelly/Kelly Rowland's ''Dilemma.'' ''The fact that Justin Timberlake ends up in a rap category is a howler,'' says Grammy expert Tom O'Neil.