Jessica Simpson arrived at Trousdale Lounge in L.A. on the arm of her fiancé Eric Johnson after dining together at Boa Steakhouse. Once inside, the happy duo made a beeline to the table where Simpson’s BFF Cacee Cobb awaited. It was Cobb’s birthday, so everybody was in a celebratory mood, and the happy couple waited for their waitress to pour them drinks. Simpson and Johnson were very affectionate at their table, constantly finding ways to touch each other. The group also toasted with champagne and serenaded Cobb with “Happy Birthday.” Simpson’s spirits were very high, a source says, as she celebrated her friend’s birthday with her new man. The couple also stayed until closing, leaving hand-in-hand, just as they arrived.