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."
Everything's fair in love and dining.
Jennifer Aniston and ex-boyfriend John Mayer dined two tables away from each other at West Hollywood's Sunset Tower on Wednesday night.
Aniston – who had visited the hotspot with the musician while they were dating – was joined by fiancé Justin Theroux, Chelsea Handler and André Balazs.
West Hollywood, CA
to my to do list
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 and John Mayer are definitely feeling the love.
The pair was described as "super affectionate and loving with one another" while out to dinner at New York eatery The Lion Saturday night, toasting Girls star Allison Williams's boyfriend, CollegeHumor.com founder Ricky Van Veen. The actress hosted a small, intimate bash for her beau, who was celebrating his birthday that night.
Following dinner, the group was treated to a surprise magic act, then spent the rest of the night playing games and savoring desserts before leaving at 2 a.m.
According to an onlooker, Mayer was "very gracious, charming and kind" throughout the evening. – Kristin Boehm
Are Katy Perry and John Mayer wild for each other – or are they just having a good time hanging with wild animals?
The duo attended a weekend bash at Hollywood talent agent Michael Kives's house, where they were greeted by several special guests: animals from a conservation (including an alligator and a kangaroo!).
"They were really cute," an attendee tells PEOPLE. "They were standing near each other most of the night, playing with the animals outside."
When they weren't checking out the nonhuman partygoers, Perry, 27, and Mayer, 34, "definitely enjoyed each other's company."
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