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Now COO of Facebook, Sheryl Sandberg donned a "silver leotard, leg warmers, and a shiny headband" in the 80s while teaching aerobics at Harvard University. Although her work clothes have changed, she credits her time as an instructor for helping her learn to fake confidence even if she wasn't feeling it at first, forcing herself to smile through the routines, which in turn helped her feel better—and she still uses that skill today.
Before they hit it big, these stars made a living at the gym and still have the bodies to prove it
Before they hit it big, these stars made a living at the gym and still have the bodies to prove it.