The three powerhouse performers posed for a selfie inside the Costume Institute Gala at the Metropolitan Museum of Art in New York City Monday, while teasing fans that they'll be "dropping our single tomorrow."
Madonna first posted the trio shot in which she is sandwiched between her new pals, writing, "Girls night out.......... Kissing the Ring........Finally!"
She was likely referring to Gaga's heart-shaped engagement ring from her fiancé, Tyler Kinney.
Perry also posted the photo on Twitter, along with the hashtag "#breaktheinternet2k15."
Later, she teased on Twitter, "dropping our single tomorrow," along with the hashtag, "#MONSTERCATREBELHEARTS."
Even if they never sing together, the three superstars seemed to quash rumors of any ongoing feuds between them.
Reports of bad blood between Madonna and Gaga first surfaced in 2012 when Madge told ABC News that Gaga's track "Born This Way" was "reductive" of her 1980s hit "Express Yourself."
Earlier this year, Madonna made it clear that there was no ongoing feud with Gaga beyond her beef over that one song.
"We live in a world where people like to pit women against each other," she told Rolling Stone.
Over the years, Perry and Gaga have both denied feuding with each other, though their tweets -- like Gaga's last year calling out Perry out copying her green hair in concert -- sometimes suggest otherwise.