Nostalgia, Ultra (stylized as nostalgia,ULTRA.) is the debut mixtape by American recording artist Frank Ocean, released on February 16, 2011. Ocean was inspired to make the mixtape after Hurricane Katrina in his native New Orleans and his subsequent relocation to Los Angeles. After joining alternative hip hop group Odd Future in 2010, he self-released the mixtape, without initial promotion. Nostalgia, Ultra has a unique R&B aesthetic and features surreal themes and nostalgic lyrics.