Jimmy Fallon and The Weeknd gave a bunch of Fordham College seniors a shock they’re going to always remember — they crashed their commencement bash on the Lincoln Heart campus in New York Metropolis!

Take a look at the video … the graduating seniors had been completely gobsmacked after they noticed the Grammy-winner stroll by means of the doorways and begin performing his hit track “Blinding Lights” Thursday — inspiring an impromptu sing-along.

TMZ is informed he even did an encore, singing “Can’t Really feel My Face” with followers as nicely.

The wild second will probably be highlighted on Thursday’s “The Tonight Present” episode, our sources say … on which The Weeknd is scheduled to hitch JF for his first-ever late-night interview.

It has been a busy few days for The Weeknd … bear in mind — he took over the DJ booth himself on the energetic after-party for his new movie, “Hurry Up Tomorrow” simply the opposite night time. He was noticed groovin’ along with his co-star Jenna Ortega and even holding palms along with his higher half, Simi Khadra.