Image Source: Getty / Steve Granitz / George Pimentel [1]

Stars — they smell like other stars! During a recent appearance on The Ellen DeGeneres Show [2], Justin Bieber was met with an unexpected question about wife Hailey Bieber's scent, and the singer proceeded to offer the best free and unasked-for promotion one could ever hope to receive: "She smells like Ariana Grande [3]'s perfume."

In the "Burning Questions" game, Bieber went on to praise the perfume a bit further. "It's a good smell. It's flowery and fruity. It's good," he said. Following the fragrance-related revelation, Grande shared the quick clip on Instagram and wrote, "I kno das right." The model soon replied, "Period!!!"

Now we're naturally left wondering: which perfume? Grande currently has five different fragrances [4] listed online for $42: Ari by Ariana Grande, Sweet Like Candy, Moonlight, Cloud [5], and Thank U, Next [6]. Unfortunately, Bieber's description did little to narrow down the list, since all of Grande's perfumes have fruity and floral elements, but — based solely on the whimsical packaging and absolutely no empirical information — something tells us the answer is Cloud. We're currently accepting any and all theories.