"Under the Mistletoe", the Justin Bieber Christmas album!!! It features his duet with Mariah Carey on "All I Want for Christmas", plus Usher on "The Christmas Song (Chestnuts Roasting on an Open Fire)", The Band Perry on "Home This Christmas", and Boyz II Men on "Fa La La".

"Lulu" - Metallica & Lou Reed. It's streaming at LouReedMetallica.com.

Metallica and Lou Reed came up with the idea to collaborate at the Rock and Roll Hall of Fame's 25th Anniversary Concert in 2009.

"Someone to Watch Over Me" - Susan Boyle

"The Sing-Off: Sounds of the Season" - A holiday album by the top a-cappella groups from the NBC show.

"The Smile Sessions", The Beach Boys - This is a collection of music recorded between 1966 and 1967 for the Beach Boys unreleased "SMiLE" album.

"Greatest Hits: Volume 2" - Journey

"A Holiday Carole" - Carole King