Rihanna reverted to retail therapy after splitting from Chris Brown — again. The singer kicked shoppers out of Atrium in SoHo Thursday an hour before the store closed. “Rihanna walked in, and people were loitering around her,” says a spy. “They asked people to leave so she could shop privately. Everyone was standing outside trying to peer in.” Rihanna was later spotted at hot spot SL at 3a.m. with a large group including rapper Wale for the second time this week, partying till 5 a.m.