In a new clip from ITV's Surprise Surprise, the 1D guys meet two sisters who have an amazing story. This is absolutely the sweetest moment.
Rachel Hooley, 11, and Kate Hooley, 15, were nominated by their mother to receive the special surprise after showing incredible courage and bravery.
Rachel experienced complete heart failure in 2012, requiring a life support machine and the need for a heart transplant. Her sister gave her complete support during this scary time and when Rachel made a full recovery, they decided to pay it forward, raising money and awareness about organ donation.
This is such a great moment: