We can’t vouch for how excited Chris Sligh is that J-Lo will be appearing on American Idol in April.But Jennifer Lopez herself is counting down the days until she takes the stage. Lopez was one of the many A-list names Access Hollywood first hinted would appear on season 6 of Idol, which was later confirmed the FOX show. Gwen Stefani and Jon Bon Jovi are also on the lineup as guest mentors this season.Until that date, Lopez - who was in Sin City with husband Marc Anthony - is busy promoting their joint film project El Cantante at the annual ShoWest convention. Could another family affair – kids – be next on the couple’s agenda?