'It's Called Earth Hour. And it Promises to Be One of the Hugest Turn-Offs Imaginable.'

Janeane Garofalo, who's cool in a dicey sort of way, lends her spokeswoman clout to the World Wildlife Federation's Big Turn Off.

The sitch: this Saturday at 8:30 pm local time (wherever you live), people around the world are committing to switch their lights off for one hour.

As noted above, Garofalo vows this'll be one of the hugest turn-offs imaginable. More of a turn-off than watching her say all this while she paints watercolours with her armpit hair. (And speaking of, who decided lengthy underarm locks should be the awkward fist bump of 2009?)

Work by Leo Burnett/Chicago with production company THEM/NYC and Editorial firm BOND. An accompanying ad -- which we haven't yet seen -- features Alanis Morissette, another chick who's not afraid to sully her sexiness if the cause is righteous enough.