===Formats and track listings===;Digital download#"I Want to Know What Love Is" (album version) — 3:26;UK digital single#"I Want to Know What Love Is" (album version) — 3:26#"I Want to Know What Love Is" (Moto Blanco Club Edit) — 3:25#"I Want to Know What Love Is" (Chew Fu Radio Fix) — 3:51;European CD single#"I Want to Know What Love Is" — 3:39#"Obsessed" (Cahill club edit) — 6:21===Charts===The song peaked on the US "Billboard" Adult Contemporary chart at #10 bringing Carey's total number of Top Ten hits on that chart to 20, one short of Celine Dion's record.
;Digital Download#"I Want to Know What Love Is" (Album Version) — 3:26;UK Digital Single#"I Want to Know What Love Is" (Album Version) — 3:26#"I Want to Know What Love Is" (Moto Blanco Club Edit) — 3:25#"I Want to Know What Love Is" (Chew Fu Radio Fix) — 3:51;European CD single#"I Want to Know What Love Is" — 3:39#"Obsessed" (Cahill club edit) — 6:21