Washington D.C. [USA] June 25 (ANI): In a sweet gesture, pop sensation Selena Gomez made a special guest appearance at Children's Hospital Orange County's oncology prom event here.

Other celebs, including Grey's Anatomy stars Sarah Drew, James Pickens Jr., Caterina Scorsone and Kevin McKidd, also attended the annual event on Saturday night, reported E Online.

The former Disney star was seen wearing a black and white polka dot dress, while she posed for pictures with fans at the prom, organised for teenagers and young adults undergoing cancer treatment as well as post-treatment survivors.

Fans took to Instagram and posted many pictures with the celebs.

"Best night ever @selenagomez #chocprom2018 #choc," one fan wrote, alongside a selfie with Gomez.

Keinlejr, a fan fighting osteosarcoma, wrote, "CHOC Prom was lit! They weren't playing around tonight! @selenagomez, @therealkmckidd and @jackblack, Thank you for taking time out of you guys busy schedule to hang out!"

"@selenagomez at Our photobooth with CHOC children! She is such a sweetheart for spending her time with these awesome kids and creating such a memorable moment they will never forget at CHOC prom night 2018 @chocchildrens #chocprom2018 #selenagomez #chocchildrens #chocprom" posted Pixtaperfect.

"And the cast of @greysabc does rounds at the prom. #chocprom2018 #chocprom" read a post on CHOC Children.

The 'It ain't me' singer has been one of the most high-profile advocates for mental health as well. (ANI)

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