Abby Miller has an incredible gift. Taylor Love has an incredible need.

Together this duo has teamed up to raise thousands of dollars for neuroblastoma research - a disease that threatens 4-year-old Taylor's life.

According to Abby, her happiest and proudest moments are when she is playing music to raise money for Taylor.

Taylor looks up to Abby as if she were the big sister she never had. Abby sees Taylor as the little sister she never had. The are each other's heroes and their love for one another is deep and unconditional.

Earlier this year, Abby dedicated "Keep Holding On" to Taylor and posted it on her YouTube channel. The video has generated international support with donations and prayers coming in from all over the world.