Kourtney Kardashian flaunted her pregnant physique at Women's Health's Party Under the Stars in Bridgehampton, NY, on Saturday. Baring her cleavage in a lace jumpsuit, the reality star was all smiles  before heading inside the party with Scott Disick. In other fun moments, Mila Kunis 's baby bump was front and center, it looked like Christmas came early for a lingerie-clad Adriana Lima, and Chris Pratt showed his support for Aubrey Plaza. Scroll through to see all that and more in this weekend's must-see snaps!
Tyler Posey got silly backstage at the Teen Choice Awards on Saturday. The Teen Wolf star had a sweet reunion with Jennifer Lopez  when he hosted the show alongside Sarah Hyland on Sunday.
On Friday, Adriana Lima slipped into black-and-white lingerie for a Victoria's Secret photo shoot in LA.
On Saturday, Kate Mara took a stroll with stylist Johnny Wujek in NYC.
Chris Pratt got silly and sweet with his Parks and Recreation costar Aubrey Plaza at the Life After Beth premiere in LA on Friday.
Before Mark Wahlberg  kicked off his weekend on Friday, the actor gave us a glimpse of his muscular arms and memorable smolder as production on Ted 2 continued in Boston.
Lucy Hale promoted her new Hollister collection  in LA on Saturday.
Joshua Jackson  and Diane Kruger  held hands on their Friday stroll in NYC.
Josh Hutcherson put his skills to the test at his third annual Celebrity Basketball Game in LA on Friday.
Jared Leto  got theatrical when he took center stage for a performance with his band Thirty Seconds to Mars in West Palm Beach, FL, on Friday.
Vanessa Hudgens  and John Stamos smiled when they spotted each other at the salon valet in LA on Friday.
Cate Blanchett  kept it casual as she shopped in NYC on Saturday.
Mila Kunis 's adorable baby bump was visible when she headed out in LA on Friday.
On Friday, Nikki Reed  lit up with a smile when she stepped out in LA.
Minka Kelly grabbed an iced beverage at The Trails Cafe while out and about in LA on Friday.
Naomi Watts  was in high spirits after a Friday workout with a pal in LA's Brentwood district on Friday.
On Friday, Amy Adams  was all smiles while chatting on the phone.
Joe Manganiello displayed his bulging biceps as he toted new purchases in LA on Friday.
Adam Lambert  revealed his sleeve of tattoos in a leopard-print t-shirt during his shopping trip in LA on Friday.
Kourtney Kardashian's baby bump was front and center when she popped up at Women's Health's Party Under the Stars in Bridgehampton, NY, on Saturday.