J. Lo joins a long line of big time acts to take the American Idol stage over the years, including Prince, Mary J. Blige, Rascal Flatts, Shakira and more.
With the competition down to the final 24 contestants, four more (two men, two women) will be voted off tomorrow night by the fans.
Meanwhile, earlier this month, Michael Jackson shot down rumors that he would perform on the Idol stage this year.
"There is absolutely no truth to the rumor that Michael Jackson is going to appear on 'American Idol,'" Jackson's rep Raymone Bain said.