Selena Gomez is once again killing 'em with kindness.
The singer made an appearance on Saturday night at the Children's Hospital Orange County's oncology prom event, which supports teens and young adults undergoing cancer treatment as well as post-treatment survivors.
Other celebrities at the event included Jack Black and "Grey's Anatomy" stars Sarah Drew, James Pickens Jr., Caterina Scorsone and Kevin McKidd. The prom's theme this year was "Around the World in One Night."
Gomez posed for photos and videos with several fans and the event captioned one of them by writing, "And then @selenagomez shows up at your prom .... #chocprom2018 #chocprom."