Just a week after a public spat with girlfriend Vanessa Minnillo, Nick Lachey got the party started with several football-player pals at Hollywood hotspot My House on March 27. The crew, including former Paris Hilton flame Matt Leinart and Kim Kardashian's beau Reggie Bush, purchased bottle after bottle of the club's finest. "They were having a great time, just laughing and hanging out with the boys," an onlooker tells In Touch. The "What's Left of Me" singer, sans his paramour of more than two years, also chatted up several blond Jessica Simpson look-alikes throughout the night. Meanwhile, Nick's ex, Kim, sat at a nearby table in the VIP room with her sisters.