Two of this artist's recent hits were written and produced by the same team that produced Britney Spears' Circus. In addition to lyrics about an ex-boyfriend, which include "I hope you hang yourself with your H&M scarf," this artist has been featured on The Kills, with such songs as "Self Inflicted," "Waking Up In Vegas," and "Thinking of You." She is currently dating Travis McCoy, lead singer of the Gym Class Heroes, and some of this artist's songs include "Ur So Gay," 
Two of this artist's recent hits were written and produced by the same team that produced Britney Spears' Circus. In addition to lyrics about an ex-boyfriend, which include "I hope you hang yourself with your H&M scarf," this artist has been featured on The Kills, with such songs as "Self Inflicted," "Waking Up In Vegas," and "Thinking of You." She is currently dating Travis McCoy, lead singer of the Gym Class Heroes, and some of this artist's songs include "Ur So Gay," and another which contains the line "We used to be just like twins, so in sync." Known for watermelon-themed clothing and a song which mentions "the taste of her cherry chapstick," this singer's second album is One of the Boys, which includes "Hot N Cold." For 10 points, name this singer-songwriter responsible for "I Kissed a Girl."
Two of this artist's recent hits were written and produced by the same team that produced Britney Spears' Circus.