J-Lo Training With Madonna’s Former Fitness Instructor

Jennifer Lopez is trying to tighten up for her debut on American Idol on January 19 and has hired Madonna’s former trainer, Tracy Anderson, to help her do it.

While J-Lo has previously worked with Gunnar Peterson, she was looking for a change of pace when picking Tracy, who has also trained Gwyneth Paltrow and Shakira.

Said a friend:

“Jennifer wanted to try something different. She loved what Tracy did for Shakira and wanted the same. Jen is one of the hardest-working fitness fanatics in Hollywood and definitely has the discipline for Tracy’s tough regime. She loves the difference Tracy’s dance workout has already made.”

We can’t wait to see what she can bring to Idol!!

[Image via L. Gallo/WENN.com.]