Ava and Leah Clements — the 9-year-old sisters who were hailed the “most beautiful twins in the world” by numerous media outlets — are now using their Instagram power to help save their father’s life.

"If he gets a transplant, his cancer will go away quicker," says Ava Clements Ava and Leah Clements — the 9-year-old sisters who were hailed the "most beautiful twins in the world" by numerous media ...