Zune and Common have teamed up with The Rap Up to offer a pair of tickets to tomorrow’s show to one lucky reader. If you’d like to see Common and N.E.R.D. in concert at Houston’s Verizon Theater tomorrow night, all you have to do is answer the following question:

• Common is one of the most vocal hip-hop leaders in the fight against HIV/AIDS. What’s the personal incident he often cites as his motivation for getting involved?

Send your answer to therapup at gmail.com. The first correct entry wins.

Be sure to keep an eye out for more from Zune and Common in the coming months. For now, you can always check out Common’s Zune social page.

Update: We have a winner. Contest Closed