Who sings that song--"Let it all hang out" in the commercial on the Discovery channel??

Is this the song?
I don't watch TV much

Brickhouse by Lionel Richie and the Commodors

YouTube - The Commodores-Brick House (http://www.youtube.com/watch?v=rrBx6mAWYPU)

In "Brick House," it goes "She's mighty, mighty, just lettin' it all hang out."

Could you be looking for "Let It All Hang Out," by the Hombres?
Here's a link with the lyrics:

Hombres (The) - Let It Out (Let It All Hang Out) LYRICS (http://www.lyricsdownload.com/hombres-the-let-it-out-let-it-all-hang-out-lyrics.html)