Jenni Rivera, Latina singer was suffering from severe abdominal pains earlier this week and as a result she had to undergo emergency surgery on Monday night (19Nov07) to remove her appendix.The 38 year old was taken to a hospital in Guadalajara, Mexico for the operation where doctors told the Amigo Si Lo Ves star the appendicitis was likely to have been brought on by her intense workload.Rivera had to cancel a number of appearances in Mexico and the U.S due to the appendicitis, 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 apologize 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."