This song features Kanye West. Christina Milian told MTV News how she came to hook up with the superstar artist and producer: "It kind of just happened. We happened to be in the same studio. I asked him to come in, and he heard it and got on it immediately. I'm glad I got to have him a part of my album." Milian added that working with West was a breeze, despite his reputation for being a perfectionist. Said the singer: "He's very creative. He can make three beats in one night and hum several different melodies on each record and then from there go back to the record and write the songs. When he came to my project that's kind of what happened. He happened to be in the studio working on his project. He heard it, he hummed out some melodies and lyrics, and the next day he put down his vocals. It's very easy breezy. I'm sure he wouldn't have gotten on it if he didn't like it."
"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.
"(What's So Funny 'Bout) Peace, Love, and Understanding" was written by Nick Lowe in 1974. The original version with his group Brinsley Schwarz was kind of somber, but Elvis Costello made it a classic with his 1978 uptempo take.