Justin Bieber told Oprah Winfrey during his 'Oprah's Next Chapter' interview that he loved girlfriend Selena Gomez for a variety of reasons, but the main one was her big, generous heart. That heart is on full, open display in this video, where the singer/actress met with a fan and made her Make-a-Wish Foundation dream come true.

Little Bailey, who recently had a brain tumor removed, got to spend some time with Gomez and the two ate ice cream sundaes together. It was sweet on multiple levels.

The little girl was incredibly brave, saying that dealing with her surgery was just a matter of "doing it and getting it over with." That's quite an adult and mature attitude for a child facing down a terrifying illness to have. Bravo, Bailey!

When she was surprised by Gomez, Bailey looked so shocked she couldn't even talk. It was like she couldn't believe that her idol was there, right before her eyes, in the flesh.

Gomez said that these are the types of things that make her love her job. She certainly uses her celebrity for good. The Biebs sure was right about his girlfriend's heart.