Consistent Kajol back with KJo!

In 1998, he started his career with Kuch Kuch Hota Hai. Since then Karan Johar has gone on to direct four big films. And all of KJos movies have had a common point Kajol. His association with Kajol continues in his upcoming film, Student Of The Year. On Saturday, Kajol did a cameo in a dance song. Since Karan considers Kajol his lucky mascot, he was very clear that she had to do the cameo. Kajol had to agree, says a unit insider.Kajol shot for the song at the Reliance Studios at Film City. And we hear that Shah Rukh Khan too will do a cameo in the film when he returns from London. Karan remained unavailable for a comment.