Soul star John Legend treated his model wife Chrissy Teigen to an early birthday surprise by serenading her at a New York City bash on Saturday (28Nov15).

The Sports Illustrated beauty turns 30 on Monday (30Nov15), but she, along with her family and friends, enjoyed a night out at the Comedy Cellar venue in the Big Apple.

In an Instagram.com video posted by Chrissy's friend and celebrity publicist Simon Huck, John is seen onstage leading the crowd in singing Happy Birthday to his wife, as a large cake is brought out in front of the model, who is pregnant with their first child.

In addition, John also organised a surprise performance by comedian Dave Chapelle, who took over the microphone to do a stand-up set.