Which unlikely music star is colloborating with Lady Gaga for H&M's Christmas 2014 campaign?

Two musical stars are set to grace H&M’s Christmas 2014 campaign and they really are the most unlikely pair.

A sneak peek from Lady Gaga and Tony Bennett’s H&M Christmas 2014 campaign (H&M)

Lady Gaga will be joined with no other than Tony Bennett, the Tony Bennett, the legendary jazz singer Tony Bennett. The duo are set to release a jazz album together next month (Andy Kropa/Invision)