Selena Gomez an Immediate Sell Out for UNICEF!

In this case, we couldn't be prouder that Selena Gomez is a huge sell out – for her UNICEF concert that is!

The UNICEF ambassader is holding her second annual benefit concert to be held on January 20th at the House of Blues in Hollywood. Tickets were nabbed up like crazy as soon as they came out, packing the house for the show.

The concert will include surprise musical guests (BF Justin Bieber perhaps??) and will benefit children around the globe by bringing them clean water, medical supplies, education and food.

Selena was quoted saying, "Giving back has always been important to me. This concert allows me to connect with my fans in person which is one of the best parts of my job and to raise money for important causes at the same time. I can't think of anything I would enjoy doing more."