While promoting her upcoming album in New York City, Katy Perry joined boyfriend John Mayer and friends at The Lion on Monday night.
After a busy day – the singer's single "Roar" hit the Internet – Perry caught up with friends at the bar before heading upstairs to a private room for dinner.
"Katy and John were adorable," an onlooker tells PEOPLE. "Katy introduced him to people as her boyfriend and John affectionately held her close with his arm around her."
Just as the 15 guests were finishing their entrees, Perry's pal Rihanna arrived.
Sure, celebs can sign a fan's guitar, but how many actually
buy them one?
"I started crying and screaming. I was the luckiest and happiest person alive," aspiring musician Julie Fermin tells PEOPLE of being gifted a guitar from her idol John Mayer.
Fermin, 16, was browsing the selection at Rudy's Music in New York City Friday when Mayer – who had performed on Today that morning – and his girlfriend Katy Perry entered the shop.
"[My friends and I] started freaking out and getting super excited," Fermin says of happening upon two of her "favorite singers."
Katy Perry and John Mayer's on-again, off-again romance appears to be back on.
After recently telling Vogue magazine that she was "still madly in love" with Mayer, Perry was spotted out with the "Paper Doll" singer at New York's Greenwich Hotel on Saturday night and, later, at Monday's Friars Foundation Annual Applause Awards Gala honoring Don Rickles at the Waldorf-Astoria.
At the event, Mayer performed a tune made famous by Frank Sinatra, which captivated Perry.
"When John performed, Katy was enamored by his performance," a source tells PEOPLE. "He sang 'One for My Baby (and One More for the Road).' When they were sitting down, she had her arm around John at one point. They shared kisses."
Who isn't at Coachella right now?
As the weekend-long music extravaganza in Indio, Calif., continues, everyone – including Kristen Stewart and Robert Pattinson who were spotted staying close together – from Katy Perry to Clint Eastwood seems to be visiting the festival grounds.
Here's how Hollywood turned Coachella glamorous:
West Hollywood, CA
to my to do list
Katy Perry and Selena Gomez gave one of their biggest fans a double dose of excitement on what was shaping up to be a very normal Sunday afternoon last weekend.
Nikki Bumatay and her fiancé bumped into the songbirds while hiking at Fryman Canyon Park in Studio City, Calif.
"We were sitting in our car when this Maserati pulls up," Bumatay told PEOPLE. "I look back and see who gets out of the passenger door and it's Selena Gomez."
Date night! John Mayer and Katy Perry joined friends for dinner at Katsuya Brentwood on Tuesday.
Sitting in a booth with pals, "the mood was great," an onlooker tells PEOPLE. "John and Katy were mellow but very sweet with each other and were really enjoying their friends."
With Perry looking "very cute" in a Herve Leger dress and high heels, the group indulged in baked crab hand rolls, crispy rice, shishito peppers, creamy rock shrimp, albacore with crispy onions and dessert.
Los Angeles, CA
to my to do list
Katy Perry gambled the night away at The London West Hollywood hotel on Thursday evening – but it was all in good fun.
The pop star, 28, wearing a form fitting black Cavalli dress with sparkly purple accents – joked with fellow guests and table dealers on the rooftop as she played her way through several games of Blackjack and craps.
"I created the Popchips bag and I wanted [my dress] to fit with the bag," she told PEOPLE as she celebrated the launch of her new flavor: Katy's Kettle Corn. "That's kind of what I do! I always want to add more sparkles to everything I do."
– Melody Chiu
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