Ariana Grande

The pop star went all out this year.

Get ready for Halloween with these celebrity-inspired costumes you can find in your own closet.

Watch the three pop stars' angelic new video!

She said she'll cherish the moment forever.

The pop star is taking her love for the actor to the next level.

The pop star woke up 'incredibly sick.'

It literally looks nothing like her.

Watch the pop star perform for the first time in two years.

Watch the hilariously wild 'Earth' video featuring Justin Bieber, Ariana Grande, Ed Sheeran, Katy Perry and Brendon Urie as animals.

JT was a no-show during Ariana Grande's surprise NSYNC reunion.