I could only decide on 4 of each. Curiously, no overlap in artists.
Songs:
Broken Bells - The Ghost Inside
The National - Bloodbuzz Ohio
Vampire Weekend - White Sky
Rosetta - A Determinism of Morality
Albums:
LCD Soundsystem - This is Happening
Arcade Fire - The Suburbs
Gorillaz - Plastic Beach
Big Boi - Sir Lucious Left Foot