The Glee guy was on hand Wednesday when Roberts hosted a launch party for Westward by Emily Current and Meritt Elliott for Kate Spade New York at West Hollywood's Petit Ermitage hotel. Guests included Jaime King and Michelle Trachtenberg.
Later that night, the lovebirds were spotted leaving Hollywood hotspot Teddy's.
Lady Gaga stopped by Beverly Hills eatery Crustacean, where she dined on garlic noodles and surf-and-turf rolls before taking time to chat with a fan. She even bought him a round of drinks.
Kris Humphries grabbed a bite to eat with friends the same night that New York Housewives stars Ramona Singer, Jill Zarin and Cindy Barshop dined at T-Bar at Savanna's in the Hamptons.
Meanwhile, Humphries' soon-to-be-sister-in-law Kylie Jenner celebrated her 14th birthday with a dinner party at Casa Vega in Los Angeles with friends and family including big sisters Kendall Jenner, Khloé Kardashian Odom, Kourtney Kardashian and brother Rob Kardashian. The following night, Gerard Butler hit Hollywood's The Sayers Club, where Jeremy Piven played drums for The Sayers Sessions band.