Age: 41
Occupation: Singer, actress, American Idol judge
Previous TIME 100 appearances: 0
Just when Jenny from the Block seemed to have, well, dropped off the block, Jennifer Lopez rebounded with a bang. Last September, she joined the judging panel for the 10th season of American Idol. Lopez works on clothing lines with her husband Marc Anthony for Kohl's, and now she and the couple's twins have become the face for Gucci's new kids' line, which launched this year. She is also scheduled to release her seventh album, Love?, later this year.