A high-rolling stockbroker who stole more than $7 million - including huge sums from investors like former Knicks star Latrell Sprewell and rapper Nelly - pleaded guilty yesterday to fraud charges. The crimes could put Calvin Darden, the son of a multi-millionaire businessman, behind bars for up to a dozen years when he is sentenced Nov. 10. Under the agreement with Manhattan prosecutors, Darden also will make $5.7 million in restitution. He stole $4 million from his former employers and more than $3 million from eight investors, authorities said. Darden, 31, landed jobs at three top Wall Street firms by boasting about a client list that included Nelly, hoop star Shaquille O'Neal, actress Angela Bassett and actor Samuel L. Jackson. The firms, AIC, Wachovia and Smith Barney, viewed him as "a new rising star in the African-American investment community," Darden's lawyer, Ben Brafman, said yesterday. Brafman said the firms never checked Darden's claims, and loaned him millions as sign-on bonuses, promising to forgive the loans if he did well. He didn't. Instead, Darden spent the money on a lavish lifestyle, buying a multimillion-dollar home in Glen Cove, L.I., with a 5,000-gallon fish tank and on meals at The Four Seasons in Manhattan and L'Ermitage in Beverly Hills. He hoodwinked investors too, taking $950,000 from Nelly and $300,000 from Sprewell to invest as he saw fit. Brafman said Darden will have to sell the house to help pay the $5.7 million restitution bill. Of that, $4 million will go to his former employers and over $3 million to eight investors he cheated. Darden is the son of Calvin Darden Sr., who was named by Fortune magazine as one of the 50 most powerful black executives in the country. The elder Darden is a retired senior vice president of UPS and a director of Coca-Cola and Target.