Ashlee Simpson Is 'Little Miss Obsessive'

Ashlee Simpson 's new single, 'Little Miss Obsessive,' which features Tom Higgenson of Plain White Ts, will be digitally released on March 11 and the full album Bittersweet World will hit stores April 22.

Ashlee collaborated Timbaland, The Neptunes’ Chad Hugo, and Kenna. She felt 'very lucky to work with people who are at the top of their game.' You can listen to 'Little Miss Obsessive' under the cut!