Gasoline

The song features raunchy lyrics about Britney being set on fire. The use of fire both figuratively and literally (and we hope in Britney's case its metaphorical!) is a frequently used device by songwriters. Check out songs where stuff is on fire for more.

The Dr. Luke and Benny Blanco produced track was co-written by Claude Kelly. The My Life Would Suck Without You and Party in the U.S.A. songwriter recalled Spear's recording of the song to PopEater: "Britney went in and knocked it out in one session. I'm really happy with the record because she sounds happy. The melody is slick and very fun. I love Britney's attitude, and there's a real sex appeal to 'Gasoline.' It's one of those sexy pop records that Britney's great at doing." Kelly added that he was also taken aback by her throwback approach to the track. "When I heard 'Gasoline,' Britney really surprised me because it sounds like she is having a good time," he said of the singer, who has overcome a series of personal difficulties.

Claude Kelly told MTV News that he came up with the dance tune while thinking of Britney's sexiest moments. "The picture that I envisioned in my mind was 'Toxic,' 'Slave 4 U,' 'Boys,' like that kind of thing where it's sexy and it's hot, sweaty and she's in a club and she sees a guy," he explained. "That mysterious, exotic look, that whole imagery and that era where she's a man-eater and all the girls want to be her and all the guys would kill to be with her. I think she pulled it off for sure."