Jessica Simpson and Eric Johnson
Courtesy Stefanie Keenan
08/27/2010 at 04:00 PM EDT
left her Dior beauty luncheon
and headed to West Hollywood's Chateau Marmont,
where she spent a marathon five-hour afternoon on the hotel's patio with boyfriend Eric Johnson
and pals. Still sporting her magenta dress from earlier in the day, the singer and her friends enjoyed cocktails during their lengthy hangout session before Simpson took off, giggling, around 8 p.m.
Meanwhile, newlyweds Emily Blunt
and John Krasinski
were enjoying dinner on the patio at the Chateau,
one of their favorite L.A. haunts. "They were super cute together," an onlooker says. Later in the evening, the duo raced over to the garden to greet Benicio del Toro
and wife Danielle
, taking in the Tom Petty concert at New York's Hudson Terrace with brother Joe
. The couple cuddled in a cabana, while Joe worked the room, mingling and snapping photos with fans.
New York Housewife Alex McCord
and Simon van Kempen
, sampling Tao's chilled vegetable Lo Mein and mingling with the crowd at the BNP Paribas Taste of Tennis party at New York's W Hotel.
and wife Nicole Murphy-Strahan
, toasting Hayden Panettiere
, who was celebrating her 21st birthday at Polar Lounge inside New York's Marcel at Gramercy Hotel. After drinks, the couple took the party to the dancefloor.
By KRISTIN BOEHM, JENNIFER GARCIA and LESLEY MESSER