Adele vs Elaine Sharp vs Jackers - You Down 4 Love? (2011)

                                         Adele - Someone Like You (acapella)
                                         Elaine Sharp "Eshar" (vocals)
                                         Jackers - Down 4 Life (instrumental)

 

Amy Winehouse vs Sia - Breathe My Tears (2011)

                            Amy Winehouse - Tears Dry On Their Own (acapella)
                                Sia - Breathe Me (instrumental)                                              

               

Björk feat. Antony Hegarty vs A Fine Frenzy - My Juvenile (2011)

                               Björk feat. Antony Hegarty - My Juvenile (acapella)
                               A Fine Frenzy - Almost Lover (instrumental)

Björk vs New Order - Cvalda Confusion (2011)

                                       Björk - Cvalda (acapella)
                                       New Order - Confusion (instrumental edit)

                   

Björk vs Eva Cassidy - Ain't Who You Are (2011)

                              Björk - I See Who You Are (acapella)
                              Eva Cassidy - Ain't No Sunshine (instrumental cover)