Now THAT's confidence in your fitness game!
Isla was spotted hiking in the Hollywood Hills of El Lay, getting so sweaty and worked up that she took her top… we mean… jacket off!
Lookin' fab, Isla! Keep up the hard work!
P.S. CLICK HERE to "follow" Perez on Twitter!
P.P.S. CLICK HERE to "like" Perez on Facebook!
[Image via FameFlynet Pictures.]