Simpson, 26, and the Boardwalk Empire actor shared a passionate smooch on the sidewalk. The couple also enjoyed brunch at La Bottega in The Maritime Hotel. "She was extremely touchy feely," an onlooker told Us Weekly.
The PDA-packed afternoon came on the heels of Piazza's recent visit to spend a few days with Simpson in L.A. earlier this month. "Vincent's a chill guy, very artsy, the quiet type," a pal told Us. "He likes her."