Today is the 10th anniversary of 9/11, and it is hard to believe that it has already been that long since the terrorist attacks occurred in 2001. Although the attacks were spread out, the most devastating attack happened in New York City as the Twin Towers crumbled to the ground, taking countless lives with them. September 11, 2011 is a day that will never be forgotten, and pop stars have been all over Twitter expressing their thoughts on this historic and sorrowful day. Nicki Minaj, who was raised in New York City, wrote about the men and women who lost their lives on that fateful September morning. Jay-Z, who is also a native New Yorker, kept it simple as he remembered 9/11 via Twitter. Lil Wayne also posted his laments for all of those who lost their lives on 9/11. See what they plus other stars had to say on the 10th anniversary of the 9/11 attacks.