Did Ariana Grande get totally starstruck when she met Rihanna? It sure doesn't look like it. Check out this cute Instagram pic that Ariana posted earlier of her and Rihanna — they look like they got along just fine!
If you could choose to meet one celeb out of any of the following stars, who would you pick: Ariana Grande, Austin Mahone, Selena Gomez, or Rihanna? Give us your answer in the comments below!