Music
- XO (Elliott Smith album), 1998
- XO (Leathermouth album), 2009
- "XO", a song on Fall Out Boy's third studio album, From Under the Cork Tree
- "XOXO", a song on Gunnie Sanotchra's 2009 studio album, Girl Crazy
- "XO", a Toronto-based gang, the most prominent member being The Weeknd
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