Latina singer Jenni Rivera was forced to undergo emergency surgery on Monday night (19Nov07) to remove her appendix, after suffering from severe abdominal pains. The Amiga Si Lo Ves star was taken to a hospital in Guadalajara, Mexico for the operation, where doctors told the 38-year-old the appendicitis was likely to have been brought on by her intense workload. The illness meant Rivera had to cancel a number of appearances in Mexico and the U.S., but the singer vowed to return to her schedule after taking a few days rest, as advised by her doctor, reports PeopleEnEspanol.com. In a message to her fans, Rivera says, "First of all I want to apologise for the inconvenience, but the work has taken a toll on me and my health, resulting in this emergency (operation)... "But I am now well and... I promise that soon I will be out there with you to (continue) my performances. "