Whose sweaty sesh?Whose sweaty sesh?Someone's looking damp around the edges.

But which star's pores have been working overtime at moistening her skin and clothes?

This one shouldn't be too tough to guess.

Why?

The reason being, we reckon this muscled songstress' second home is the gym.

She's so toned and honed we sometimes wonder if she chews on dumb-bells for an after breakfast snack.

OK, not really, but she is in some serious shape for someone turning 50 this year.

Age aside, though, she's not the only star to glisten with sweat.

See our gallery of sweaty errors.