GLENDALE, Calif. -- A day at the Montrose Farmer's Market became a very special occasion for a local couple.
Arthur Kasabyan got a little help from the LA Rock Choir to put on a flash mob-style performance.
Out of nowhere, they started singing "Marry You" by Bruno Mars.
Kasabyan's girlfriend didn't know what was happening until her now-fiance dropped to his knee and asked a very important question.
"From kindergarten, to best friends, to finally being lovers. Baby, will you please be my forever?"
The crowd cheered as his emotional partner said yes.
Kasabyan said the choir spent the last four weeks rehearsing for the big surprise.
Man proposes to girlfriend with flash mob-style performance