Dan + Shay, Robert Downey Jr., Justin Bieber in the Hamptons

It was a starry weekend in the Hamptons.

Justin and Hailey Bieber were seen having dinner at Camp Rubirosa in East Hampton, while Robert Downey Jr., Marci Klein, Liev Schreiber, Katie Holmes, Donna Karan and more attended a a screening of Olivia Wilde’s new movie “The Invite.”

Neil Patrick Harris and David Burtka held a cocktail party at their home, Funhouse Farm, in East Hampton to support God’s Love We Deliver.

Country stars Dan + Shay performed a number of their hits, including “Tequila,” as well as a new song at Stephen Talkhouse in Amagansett for a crowd that included Don Lemon, Steve Madden and roastmaster Jeff Ross.

The evening, put together by Soho Sessions, benefited the Flag Art Foundation and mental health support organization NAMI.

The chart toppers gave an emotional tribute to Warner Chappell president and CEO Ben Vaughn, who died by suicide last year, before launching into their song written for him, “Say So.”

Over in Montauk, “Dancing With the Stars” contestant and influencer Alix Earle was seen with her whole family at Mary Lou’s in Montauk, including her dad, Thomas “TJ” Earle and her stepmom, former call girl Ashley Dupre, her mother Alisa and her boyfriend Todd Galski. The group were spotted passing around a bottle of Don Julio 1942.

Earle was in town to promote her drink brand, Sips Margs, at Surf Lodge with people tipping back the canned drinks while watching DJ Cassian at the lakeside hotspot.

Influencer Ruby Saracino got on stage during a suprise performance by Lil Yachty, taking the mic to belt out the lyrics to his song with Social House, “Magic In the Hamptons.”

Meanwhile, over in Bridgehampton, the Daily Front Row celebrated the Hamptons most stylish with a chic poolside fete at Purvia Padia’s mansion that brought out Bronx Banco designer Natalie De’Banco, Candace Bushnell, Isaac Boots, Timo Weiland, Noble Black and the mag’s editor-in-chief Eddie Roche.

Earlier, the brand held a brunch at the new Barlume Beach in Montauk with Lavazza, with influencers like Jill Zarins daughter Ally Shapiro.