Kate Winslet's hit single was written by Steve Mac who has penned hits for Westlife, Boyzone, Five, O Town, Mariah Carey and Samantha Mumba, to name a few.
All proceeds from the emotional and tender What If, which reached number 6 in the singles charts in December, will benefit two charities: the NSPCC and The Sargeant Cancer Care For Children.
Also featuring on the album soundtrack, which is in shops now, are two tracks by teen singing sensation Charlotte Church.
Kate Winslet provides the voice for Belle in the movie, along with other stars Nicolas Cage (Ghost of Marley), Rhys Evans (Cratchit) and Jane Horrocks (Mrs Cratchit).