In a 90-minute interview to air on MTV on November 30, two days before the release of her new album "Circus", Britney Spears says: "I sit there and I look back and I'm like, 'I'm a smart person. What the hell was I thinking? I've been through a lot in the past two or three years, and there's a lot that people don't know." The special also features behind-the-scenes footage of the singer and her talking about her life over the past two years, including her divorce, public custody battle, stint in rehab, very public meltdowns and one uncharacteristically bad performance at the MTV Video Music Awards. Spears says she hopes the TV special will "set the record straight" about her life.Read More Hot Stories Moms Are Talking About