: abby miller can't remember when she startedded to sing. >> i just never really never sang. >> reporteris middle schooler is using her voice to reach out to a little girl who doesn't remember a time when she wasn't sick. abby, a cross between miley cyrus and goodwill embassy she has dedicated avilla seen's song, keep holding on to taylor from washington. >> the 12-year-old's youtube video has received 14,000 hits after posted earlier this month and nearly 2 million have viewed her music videos combined. taylor is fighting a debilitating disease called neuroblastoma, a cancer that attacks the nervous system. little taylor has spent half of her life in the hospital and the focus of many news stories but since the two have teamed up on youtube they have gone global. >> abby and taylor together have brought neuroblastoma to the world. >> reporter: the two first met at a fund-raiser for taylor a year ago and since then they shared a special bond. >> i think it is more like a little sister. >> thank you. >> like a little sister relationship. >> reporter: abby made it her mission to do good an

. ♪ >> reporter: it's a friendship between two children who share a love for music. 12-year-old abby millernd 4-year-old taylor love, are almost like sisters, brought together by a deadly disease. >> i love her. she's really fun, she's cute, she's smart. >> reporter: taylor may look healthy but when she was just 18 months old, she was diagnosed with stage 4 high risk knew row blast oma. >> the oncologist total us our daughter had cancer in her eyes and a great fruit-size tumor in her belly, and over the next few days we learned it was through her bone marrow and different spots in her body. >> reporter: last year, abby found out about taylor who lives near her. abby loves to sing and wanted to lend her musical talts to help in the little girl's fight ♪ holding on ♪ >> reporter: abby stars in a public serve ace announcement of on youtube. taylor undergoing treatments. >> the reason why was just to get people aware of it and to get people interested in helping. >> reporter: thanks to expensive medical care and support from people like abby, right now doctors don't see any cancer in taylor. st