Ikr. He was nominated in a major category, too. Not some random one like Gaga.
HOW is he eligible?
A mess.
"In 2010, Lady Gaga's exclusion from the Best New Artist category has caused the Recording Academy to change eligibility requirements for the next ceremony. She was ineligible for the nomination because her hit "Just Dance" had been nominated in 2009. The new rule states that an artist can be nominated as long as the artist hasn't released an entire album and doesn't win."
But + was released in the US during last year's eligibility period so...