Selena Gomez Doing Good One Dress at a Time

With a burgeoning music and movie career, not to mention a wildly-popular clothing line under her belt, Selena Gomez has been one busy girl—but not too busy to lend a hand—and a gorgeous dress!—to a great cause. The UNICEF ambassador is auctioning off the glamorous Catherine Dean gown that she wore in her “A Year Without Rain” video to raise money for UNICEF in its mission to help disadvanated children in need worldwide. “

It’s a beautiful dress,” Gomez tells PEOPLE exclusively of the chiffon gray halter gown. “It was obviously a very important part of the video — we wanted it to be very beautiful and very flowy and I got so many great comments on it so I thought it would be awesome to give it to charity.”

Available now through Nov. 10 via online auction site Charitybuzz, the stunning dress is not the only item that the Disney star is auctioning off! Just in time for Halloween, Selena is offering one fan and five lucky friends the chance to see and meet her during her first-ever acoustic concert at The Roxy Theatre in West Hollywood on Oct. 26 to celebrate the 60th anniversary of Trick-or-Treat for UNICEF campaign.

“To be able to see what they do for these kids—it’s amazing and everyone cares so much. It’s really inspiring,” Gomez tells PEOPLE.

So what are you waiting for? Get bidding on these once in a lifetime opportunities at charitybuzz.com today! - Gillian Koenig