When the track listing for Britney Spears' upcoming album, 'Femme Fatale,' was released earlier this month, fans got more insight into the hotly anticipated record. Hotshot songwriter Claude Kelly is one of the names attached to the March 29 project, and according to the in-demand talent, who wrote Spears' 2008 comeback hit 'Circus,' fans can expect an even more upbeat and sexy Spears.

"I wrote this song called 'Gasoline' for the new album," Kelly tells PopEater of the Dr. Luke and Benny Blanco-produced track. "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."