Olivia Munn

Joining in on the annual celebration of those trying to make the world a better place, Olivia Munn was on hand for the 2011 Do Something Awards in Los Angeles, California on Sunday night (August 14). The “Iron Man 2” actress looked fabulous in a tight-fitting green and grey striped top paired with a black skirt as she roamed the backstage area at the Hollywood Palladium venue prior to her presenter duties.

They joked last year that they were girlfriend and boyfriend before despite the 13 year age gap - and Justin Bieber and Kim Kardashian were reunited last night. However, in a neat twist, it now appears that the pair are in the business of matchmaking for other people. Kim, 30, and Justin, 17, were back together at the Do Something Awards last night and were pictured having fun together.

We’ve already told you about the all-star lineup of presenters and performers who will be at the 2011 Do Something! Awards this year, a list that includes Adam Lambert, Victoria Justice, and Nick Cannon, to name a few. But just today we learned of a few more A-listers who will be on hand at the show and if we can be quite honest, this list? It’s insane. Check out the full roster of attendees and presenters after the jump! The Do Something! Awards air on Thursday, August 18 at 9 p.m. ET/PT.

Olivia Munn and Pretty Little Liars actress Ashley Benson arrive at DoSomething.org and Staples’ Teen Choice Awards after party, held at the Globe Theatre on Sunday (August 7) in Universal City, Calif. The 31-year-old actress wore an Express dress paired with YSL boots. Ashley, 21, wore an alice + olivia dress and accessorized with a unique pair of Ruthie Davis heels.

VH1 announced the presenters for the 2011 Do Something Awards, which airs on Thursday, August 18 at 8:00 p.m. CT. For Oklahoma fans, the big selling point is Oklahoma native Olivia Munn. Munn joins Kristen Bell, Nick Cannon, Jon Cryer, Victoria Justice, Adam Lambert, Mario Lopez, Rose McGowan, Keke Palmer and Lauren Potter as presenters for the show.

VH1 has announced the lineup of presenters for the 2011 Do Something Awards, airing at 8 p.m. Aug. 18 on the network. Former Oklahoman Olivia Munn is scheduled to be a presenter, along with Kristen Bell, Nick Cannon, Jon Cryer, Victoria Justice, Adam Lambert, Mario Lopez, Rose McGowan, Keke Palmer and Lauren Potter, according to a news release.

At DoSomething.org, we believe that teens have what it takes to fight climate change—and win! That’s why DoSomething.org has teamed up with HP for Green Your School Challenge. From February 1st to April 1st, students across the nation are working on projects in their schools for the chance to win grants and awesome prizes from HP. Think you have what it takes? We do! Join the fight:

Photo credit: DoSomething.org This year, DoSomething.org and HP teamed up to host the Green Your School Challenge. The goal was to get students and teachers thinking about creative ways to reduce energy and consumption in their schools. Now, after months of work, the winners have been announced.

HP (NYSE:HPQ) and teen not-for-profit DoSomething.org announced the winners of the “Green Your School Challenge,” which encouraged teens to use technology to generate awareness and have a positive impact on the environment.

During the 10-week campaign, which ended on Earth Day, youth from more than 2,500 schools representing hundreds of thousands of teens nationwide led ecofriendly projects, including:

“Green Your School Challenge” from HP and DoSomething.org Draws 2,500 Participants

Five most innovative environment projects receive grants and HP technology

HP (NYSE:HPQ) and teen not-for-profit DoSomething.org announced the winners of the “Green Your School Challenge,” which encouraged teens to use technology to generate awareness and have a positive impact on the environment.

During the 10-week campaign, which ended on Earth Day, youth from more than 2,500 schools representing hundreds of thousands of teens nationwide led ecofriendly projects, including: