Rivera's plane went missing around 3:30 this morning shortly after takeoff from Monterrey, where she had given a concert last night. It was bound for Toluca, outside of Mexico City, but never reached its destination.
A search is under way for the 43-year-old US-born Rivera, best known for her work in regional genres, including norteña.
Singer Jenni Rivera performs onstage during the 11th annual Latin GRAMMY Awards at the Mandalay Bay Events Center on November 11, 2010 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images for LARAS)