Janet Jackson reminds viewers that the fight against AIDS isn't over and encourages people to get tested for HIV and if positive, seek out treatment. The musician, a longtime ambassador for The American Foundation for AIDS Research, has also cowritten an op-ed along with the organization's founding chair Mathilde Krim for CNN. In the essay, the two write, "We need to realize that AIDS will remain with us as long as we keep our guard down. The dialogue we start this week needs to take place every day, not just World AIDS Day. Talk to your kids about the importance of safe sex and abstinence. Talk to your partners about the importance of monogamy." For more information go to amfAR.org. Watch Jackson's PSA below.