Music on Instagram: "During a live performance of “Problem,” Ariana Grande shared a quick joke on stage that flew over most of the audience’s heads, but Rihanna, who was present, immediately caught it and burst out laughing, creating a memorable, unscripted moment between the two stars. As Ariana smoothly transitioned back into singing “I got one less problem,” the exchange highlighted her playful personality and natural stage charisma, while Rihanna’s reaction added a layer of authenticity and