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The top five selling singles and albums on iTunes for the week ending Dec. 20:

Singles:

1. "Grenade," Bruno Mars

2. "Firework," Katy Perry

3. "6 Foot 7 Foot (feat. Cory Gunz)," Lil Wayne, Cory Gunz

4. "The Time (Dirty Bit)," Black Eyed Peas

5. "What's My Name?" Rihanna, Drake

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Albums:

1. "Tron: Legacy," Daft Punk

2. "'Glee': The Music -- The Christmas Album," "Glee" Cast

3. "Love Letter," R. Kelly

4. "Michael," Michael Jackson

5. "My Beautiful Dark Twisted Fantasy," Kanye West

-- Associated Press