Britney Spears is an American singer, songwriter, dancer, and actress. Often referred to as the "Princess of Pop", she is credited with influencing the revival of teen pop during the late 1990s and early 2000s. Spears has sold more than 100 million records worldwide, including over 70 million in the United States, making her one of the world's best-selling music artists. For a number of years, Spears's personal struggles were widely publicized by the media. Amid these struggles, and potentially as early as 2005, Spears's father Jamie had "prayed and fasted" with business manager Lou M. Taylor to place Spears in a conservatorship. In September 2006, Spears gave birth to her second son, Jayden James, with then-husband Kevin Federline. It was speculated that Spears suffered from postpartum depression. In November, Spears filed for divorce, citing irreconcilable differences. She and Federline reached a global settlement in July 2007 and agreed to share custody of their two sons. In January 2007, Spears lost her aunt, with whom she was close, to ovarian cancer. In February, she shaved her head in a Los Angeles hair salon and assaulted paparazzi with an umbrella. In the following weeks and months, she was in and out of treatment facilities, and was often seen with associate Sam Lutfi, later accused of being a negative influence and against whom many restraining orders were issued. She also began a brief relationship with paparazzo Adnan Ghalib. In April, Spears fired manager Larry Rudolph and mocked his team, sarcastically referencing a woman telling her to "go to the light and see Jesus". This was a decision her family disagreed with. However, Spears embarked on The M+M's Tour in May. In September, she was charged with misdemeanor counts, including a hit-and-run, after crashing into a parked car; that same month, she performed "Gimme More", the lead single to her then-upcoming fifth album, at the 2007 MTV Video Music Awards. The performance was extensively panned by critics, who criticized her choreography, weight, and stage presence; it also generated a viral response in Cara Cunningham's "Leave Britney Alone!" YouTube video. In October 2007, Spears lost custody of her two sons for undisclosed reasons. Later that month, she released Blackout (2007). It was her first album not to reach the top of the Billboard 200 because of a last-minute change in how album sales were counted, yet it has become widely considered her best and