Photos: Justin Beiber Headlines Star-Studded 'Hot 99.5 Jingle Ball 2012' Concert at GMU Patriot Center

PSY, Enrique Iglesias, Flo Rida, Cher Lloyd and more!

It's a wonder that the windows of the George Mason University Patriot Center are still intact. On Tuesday night, thousands of screaming fans attended the Hot 99.5 Jingle Ball concert, and the lineup included performances from Justin Bieber, Enrique Iglesias, Ke$ha, Flo Rida, Ed Sheeran, PSY, Austin Mahone and Cher Lloyd.  Enjoy the photos! Did you attend the concert? Add your photos to this gallery!

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Tackling Technology

Using Twitter Hashtags to Follow Events

When an event has everyone's attention, join the conversation using Twitter hashtags.

Twitter is changing the way we interact during special events. By searching a topic via hashtag (the symbol # and a keyword following) you can get on-the-ground updates, news, insights and trivia from those on the social network. Following the space jump This Sunday my family was transfixed by the space jump by Felix Baumgartner. In the midst of a relaxing Sunday afternoon my husband was reminded via Twitter that the rescheduled event was on. He jumped onto the YouTube stream. Walking by the home office I noticed the video image and jumped on my own computer to watch. I was never able to get onto the YouTube stream (over three million people were watching at that point), but the various data such as altitude, speed, temperature all were …

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