A Hollywood date night was music to Justin Bieber and Selena Gomez's ears on Sunday.

The longtime lovebirds made their way to the Living Room Lounge at the W Hollywood for the hotel's Sunday Jazz Series, taking in a performance by resident Brenna Whitaker and her Little Big Band, as well as child trumpet and tap dancing phenomenon, Gabriel Angelo, who appeared on Ellen DeGeneres's talk show in April.

"Gabriel received a standing ovation from Justin and Selena," an onlooker tells PEOPLE of the couple, who "looked very much in love as they held hands at a front-row table."

According to the source, the lovey-dovey duo "left discreetly around midnight through a back exit."
– Jennifer Garcia

Love was in the air for Emma Stone and Andrew Garfield on Thursday night.

The Amazing Spider-Man costars made their off-camera adoration known when they dined with about 10 people at Ninethirty at the W Los Angeles-Westwood.

"The two held hands the entire time," an onlooker tells PEOPLE. "Emma sipped ginger ale and snuggled next to her man. They seemed so in love and happy."

As for the menu, "he ordered food and she didn't," the source says, adding that "he fed a couple of bites into her mouth."
– Dahvi Shira

Taking a break from parenting duties, Ben Affleck and Jennifer Garner stepped out for some alone time.

The happy couple recently stopped by Whiskey Blue inside the W Los Angeles – Westwood hotel, where they sat at the bar and had drinks together.

Garner, who sipped on red wine; and Affleck "were smiling, laughing and very affectionate towards each other," an onlooker tells PEOPLE. "Jen's post-baby body looked amazing!"

Money was apparently no object for the married pair, who left a generous $20 tip for a $30 bill. But there's a chance Affleck had some extra cash laying around after competing in the "Playing for Good" poker tournament benefiting the Geffen Playhouse just a little bit earlier.
– Jessica Wedemeyer

Salma Hayek was the life of the party during a fiesta honoring the makers of her latest film, Puss in Boots, at Red O in Los Angeles. The actress joined costar Antonio Banderas and his wife, Melanie Griffith, plus a group of about 10 friends and colleagues, and spent the evening "talking excitedly and telling stories," an onlooker tells PEOPLE. The partygoers noshed on a variety of tamales, and sipped signature cocktails like spicy margaritas and sangria. The event broke up around 9:30 p.m., and Hayek left solo, followed shortly thereafter by Banderas and Griffin, who, though not overtly affectionate, "seemed to enjoy their night out together."
– Jessica Wedemeyer

Detecting some jealousy here? Nick Jonas hit the town with big brother Joe Sunday night, grabbing a center table at the W Hollywood for singer Brenna Whitaker's jazz show. Soon after, former American Idol finalists Haley Reinhart and Stefano Langone sat down next to them – and Nick couldn't keep his eyes off of Reinhart. When Langone noticed the attention his lady friend was receiving, he "started making out with her frequently," a source tells PEOPLE. But there was no bad blood: Reinhart "looked like she was enjoying every minute of the attention," the source continues. – Dahvi Shira

Julianne Hough was having a ball at the official Footloose afterparty at Whiskey Blue inside the W Los Angeles – Westwood. She was partying with doting boyfriend Ryan Seacrest, who was very supportive of his leading lady. The pair danced the night away, took tequila shots and even stole smooches in front of everyone. Seacrest was also spotted giving Hough's brother, DWTS pro Derek Hough, a friendly hug. – Dahvi Shira

An on-the-mend Ali Fedotowsky attended the Gilt City "Ladies Who Lunch" event at the W Los Angeles – Westwood with a girlfriend – and she was ready for food and fashion! The reality star and her pal sipped champagne and enjoyed a three-course meal, as well as looks from designer Trina Turk's new fall collection. After lunch, Fedotowsky popped out to the terrace to scope out the clothing up-close.