Not too long ago, we told you all about how Ariana would love to perform the Mashup of "One Last Time" and "What Do You Mean", and now there is some more to add to the #Jariana list of things…

Ariana is on tour at the moment, which means she could have brought her bud Bieber on stage… but she didn't. Can you figure out what she did instead?

YES, SHE ACTUALLY SANG "WHAT DO YOU MEAN". I know, too much to handle hun?

Check it out!