This duet finds Pharrell and Alicia Keys taking turns to empower a lady who needs to be lifted up. Pharrell referred to this during the album's listening party as his "soldiers' hymn" for those closest to him.
Keys starts the second verse with the line: "I want every woman to make a pledge with me." Pharrell commented that working with Keys on the song "made all the sense in the world, because that's who she is. She embodied the pledge."
"Kickstart My Heart" is about all the ways Motley Crue gets their blood flowing without drugs. It was inspired by their bass player Nikki Sixx, who claimed he had to be revived with a shot of adrenaline to the heart after an overdose.
The Naughty by Nature hit "O.P.P." doesn't have any curse words, but many oversensitive radio stations played a "clean" version with the word "kitten" edited out, surely the first time that word was censured.