Jessica Simpson gets into fitness mode

London: Jessica Simpson has hired celebrity trainer Tracy Anderson to get her into shape ahead of her forthcoming wedding.

The singer-and-actress whose weight has fluctuated over the years, wants to look her best when she marries fiancé Eric Johnson later this year, reports

"She wants to look healthy. She`s seeing results. She really loves it. She thinks it`s so much fun," said a source.

Tracy has previously worked with Madonna and Nicole Richie and is responsible for Gwyneth Paltrow`s amazing post-children body.