Hot Product brings you all the week's hottest new releases. This week: Ashlee Simpson's "Bittersweet World," Flight Of The Conchords' full-length debut, Elvis Costello's "Momofuku" on vinyl and more!

Hot Product brings you all the week's hottest new releases. This week: Ashlee Simpson's "Bittersweet World," Flight Of The Conchords' full-length debut, Elvis Costello's "Momofuku" on vinyl and more!