Jessica BielJessica BielJustin Timberlake is not a man deterred by a bit of sweat.

You'll remember this from his days of dating the often-perspiring Cameron Diaz.

So is his supposed new girlf Jessica Biel feeling the pressure to meet Just's demands for wet underarms?

Nope - things aren't that kinky in Celebville.

Jess is getting her pits smelled as part of MTV TRL, Stateside.

She ventured onto the show with her I Now Pronounce You Chuck And Larry co-stars for a bit of promotional fun.

And we all know how much those ker-ay-zee TRL types like to mess around.

See the results in our gallery.