12/18/2009 AT 06:00 AM EST
Was she buying gifts for Reggie? Kim Kardashian
went shopping at the Under Armour pop-up shop in New York with sister Khloe
. The reality star picked up a hoodie for herself – and the M Series Boxerjock for her boyfriend. "They were very friendly and super nice," an onlooker says. The sisters bought so much, they actually had to buy some duffel bags on site so they could pack everything up and bring it home to L.A. with them!
New couple alert? Audrina Patridge
's Mark Salling
were flirting and hanging out at Seth MacFarlane's Winter Wonderland bash sponsored by Night Vision Entertainment. But, an onlooker says, Salling was quite the ladies' man that night: He was spotted dancing with a hot blonde and several other female party guests. Meanwhile, Paris Hilton
and sister Nicky
snapped photos with MacFarlane, while the heiress professed her love of his show Family Guy
. Also there: Alyssa Milano
and new husband David Bugliari
Though she said she was only looking for a swimsuit cover-up, Cindy Crawford
ended up spending $600 – and leaving with a whole lot more while shopping at Fred Segal Fun in Santa Monica, Calif. The supermodel bought two Ella Moss swimsuits and two Sena tops – and also chatted with the cashier before leaving.
enjoyed dinner at Dos Caminos Park in New York with three friends. On the menu? Margaritas, beer, lots of guacamole and shrimp quesadillas.
, cooing at a baby seated behind her on a flight from Ft. Lauderdale, Fla., to New York. "She was smiling at the baby," an onlooker says, noting that the actress helped calm down the child. Gyllenhaal, who was flying with her mom Naomi
, was sitting in a window seat, and dressed casually in glasses for the flight.
By DAVID CAPLAN, JENNIFER GARCIA, KRISTEN MASCIA and LESLEY MESSERThursday's Caught in the Act >