Rex Reed, the prominent and outspoken film critic and journalist known for his longtime column in The New York Observer, died Tuesday. He was 87.Reed died at his Manhattan home after a short illness, publicist Sean Katz said on behalf of Reed’s friend William Kapfer. In a career spanning more than six decades, Reed became one of the most well-known voices in cultural criticism. He published eight books, acted in movies (playing himself in “Superman”), counted movie stars like Angela Lansbury as friends and often found himself in the spotlight for controversial comments. Most infamous among them was his assertion…