Bonnie Leigh McKee (born January 20, 1984) is an American singer and songwriter. Her debut album, Trouble, was released in September 2004 under Reprise Records. After being dropped by Reprise several years after its release, McKee had taken a musical hiatus before establishing a name for herself as a songwriter. McKee has co-written eight singles that have reached #1 in the United States or the United Kingdom, which have sold more than 30 million copies worldwide combined. After sometime of focusing on songwriting, McKee released "American Girl" in July 2013. Her second studio album is scheduled for release in 2015. American Girl was intended for her second studio album but after leaving her label in late 2014 after creative differences, it is unknown whether or not American Girl will appear anywhere else. McKee is particularly known for collaborating with pop singer Katy Perry, and the duo have co-written the hits "California Gurls," "Teenage Dream," "Last Friday Night (T.G.I.F.)," "Part of Me," "Wide Awake," and "Roar" together. McKee also co-wrote "Dynamite" by Taio Cruz, which became the second best-selling song by a British artist in the digital era.