Talia Castellano, 13-year-old YouTube Star, Dies After Battle with Cancer

Talia Castellano, the 13-year-old YouTube sensation who appeared on The Ellen DeGeneres Show, has died after a battle with cancer.

"It is with a heavy heart that we share with all of you that Talia has earned her wings at 11:22am," her family wrote on Castellano's Facebook page. "We will miss you more than you will ever know baby girl."

Remember other celebrities we lost this year

Castellano was diagnosed with cancer when she was just 7 years old. After she began posting makeup tutorials on her YouTube channel, she gained a following of more than 845,000 subscribers. In 2012, Castellano appeared on Ellen and got the surprise of a lifetime when she was named an honorary CoverGirl. DeGeneres also sent her to the iHeartRadio music festival where she interviewed some of Hollywood's biggest celebrities.

"It's a sad day at The Ellen DeGeneres show, read a post on the show's Facebook page on Tuesday. "This morning, we lost a friend. Talia Joy Castellano was an inspiring young makeup artist with a lot of talent and a lot of heart. She inspired everyone at the show, and many, many more. Our hearts are with her family. We love you, Talia."