While not as scandalous as his gig in November at the Kirkorian bar mitzvah at the Beverly Hills Hotel in Los Angeles – where co-headliner Iggy Azalea's pants split, revealing more than she had planned – Jillian Glasgow's Paris-themed celebration in New York City this week is a Jewish life-cycle event that she, too, won't soon forget.
Without Glasgow's prior knowledge, Jonas took to the stage for a three-song set. He was reportedly paid $100,000 for the 30-minute solo-performance.
Thrilled as Glasgow was to have one of her favourite performers serenade her and her guests, seen here in this video, another young fan steals a precious moment of her own by running onto the stage to embrace the hit-maker and sing along on the bat mitzvah's microphone mid-song.
Top music artists making surprise appearances like this are a cultural trend that is clearly showing no signs of ending any time soon.