Ariana Grande teamed up with Jimmy Fallon ... the unsuspecting individuals began belting out Grande’s hit “One Last Time” — only to be shocked mid-song by the singer herself!

Ariana is releasing 'One Last Time' as the latest single from her album 'My Everything', after hits like 'Problem' and 'Break Free'.

The memory ends and elderly Peaches chooses to watch the last one which is ... delves deep into Ariana’s relationship with her family and herself. As a long time Ariana Grande fan, it was ...