Bobby Brown treated his future sister-in-law to a special performance at a New York restaurant last weekend (21-22Apr12) in honour of her birthday.

My beautiful sister-in-law, I love you so much

The New Edition star threw a surprise party for Kim Etheridge, sister of his fiancee Alicia Etheridge, at The Darby venue in Manhattan on Saturday (21Apr12) following a gig with his band at the WaMu Theater at MadisonSquare Garden.

During the bash, Brown jumped up on stage with the restaurant's in-house band and sang his hit track My Prerogative for the crowd.

According to New York Post gossip column PageSix, he dedicated his performance to Kim, saying, "My beautiful sister-in-law, I love you so much".