After Lauryn Hill canceled her performance at the Grammys [1] on Monday, we finally got a glimpse of the duet that could have been when the vocalist joined The Weeknd during a performance of his hit single [2] "In the Night" on The Tonight Show Starring Jimmy Fallon on Friday. Of course, her appearance was a surprise as The Weeknd introduced her halfway into his set, but it was well worth the wait. Talk about a match made in musical heaven! Later that night, The Weeknd took to Twitter [3] and wrote, "Most important experience of my life. thank you Ms. Hill." Watch the entire performance above now, and then relive The Weeknd's sultry Grammys performance [4].