A jealous Solange Knowles was so bothered by some pre-interview mentions of her sister that she inadvertently spilled the beans about her big sister Beyonce’s “secret” marriage to rapper Jay-Z - which everybody riding on the planet already knows about anyway.

According to reports, Solance was approached off camera at Fox 5 TV in Las Vegas where she dropped by to promote her album and told station people she wouldn’t discuss reports about Jay selling his 40/40 Club in Vegas or talk about Beyonce - which is just what went down. When she was very warmly introduced as being the lil sis of someone famous - SPARKS FLEW!!