Katy Perry, John Mayer & Rihanna’s N.Y.C. Night: Dinner, Drinks & Instagram!

Katy Perry and Rihanna. Inset: John Mayer

AKM-GSI(2); inset: Splash News Online

08/13/2013 AT 11:45 AM ET

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 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.

The “Diamonds” singer sat next to Perry and Mayer and the trio caught up. Rihanna even posted a snapshot with Perry on Instagram, writing “She. X She. #KatyAnna #RIHunited”


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