Today marks a decade since hijacked planes crashed into the World Trade Centre in New York, the Pentagon and a field in Pennsylvania, claiming the lives of nearly 3,000 people.
Taking to Twitter, Glee star Michele wrote: "To all the families and people of New York affected by the tragedies of September 11th my thoughts and prayers go out to you. NYC is one of the most strong & beautiful places in the world. I feel so blessed & proud today to have been born and raised in this city."
Minaj tweeted that she was "sending love to the victims of 9/11. Remembering the heroism. The brave men & women. The troops. We become alive in the time of fear", while LeAnn Rimes said: "Sending out prayers for those who lost loved one's on this day 10 years ago. Praying that it gets less painful as the years go on."
Dancing With The Stars contestant Kirstie Alley urged followers to "honour" any loved ones who perished on the fateful day, suggesting: "[Do] what they would have loved doing...that's what I would want too...
"So many Heros to remember.The ones who died & the ones who fought to save them...& those who fight daily to ensure our freedom. We salute U."
Black Eyed Peas star will.i.am tweeted that he was "remembering 9/11" by "sending love to the world so no hate, fear, pain, or distortion happens," while actors Rob Lowe and Eliza Dushku both promised to "never forget" the attacks.
Lady GaGa said earlier this week that she is still in "disbelief" over the "horrific" events of 9/11.
Matthew Broderick and Brooke Shields were among the stars of a commemorative 9/11 show in Times Square on Friday.