In case you're in need of some motivation to get your butt to the gym here's thisweek's most enviable celebritity bikini bodies:

Madonna was spotted jogging with her ex and father of her daughter Lourdes.

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You decide, is Madonna too muscular?

SOURCE: thesuperficial

I saw this the other day and just had to post it. Sorry if it's a little corny.

There is no way that Christina Milian could have that body with out putting some serious time in at the gym. You can tell she's worked very hard for her figure.

Rather than taking her regular ride home, fitness buff Madonna extends her workout with a bike ride following a session at her London gym on Tuesday. Now isn't that a constructive idea?

I haven't posted in a few days because I've been sick. I'm feeling better now andI'm back to posting. Enjoy these FITCLICKS!

The latest issue of In Style magazine highlights Jessica's fitness and diet plan.

The Australian singer-songwriter-model-actress enjoyed a session of power walkingthis week. Her secret for fitness success; bring a friend along for motivational support!

Cameron happily shows off her fit body at the beach. I think she's been looking her best lately. Do you think she looks better now or before she started hitting the gym?

Here's Jessica leaving the gym after yet another workout!

She's been wearing lots of baggy clothing lately. I'm wondering when she'll reveal her new body...

The Hill's Heidi Montag shares her fitness secrets with US Weekly.CLICK HERE to see the clip.