Work, B*tch! Lithe Method's Lauren Boggi on the Perfect Playlist

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Welcome to Racked's Fitness Week: five days of workout coverage, so that you can start your New Year's resolutions off right.

If you've ever wondered what goes on behind the walls of one of Lithe Method's wildly popular workout sessions, here's a tidbit of info: Class-goers sweat it out to a playlist that's equal parts upbeat and singalong-worthy, complemented by a dash of surprise. "If a playlist gives me the chills and makes me feel sexy, it's right on point," says Lithe Method founder Lauren Boggi, whose cheer-inspired aerobic workout has helped to shape the rear ends of countless Philadelphians.

From Britney to Lana Del Rey, the ten songs currently fueling Boggi's workouts are after the jump.

· All Fitness Week 2014 coverage [Racked Philly]
· How to Work Out Like Philadelphia's Hottest Trainer [Racked Philly]
· Hottest Trainer Contestant #7: Lithe Method' Melissa Weinberg [Racked Philly]