That that bypassed the Sullivan Theater in New York City yesterday, where The Late Show with David Letterman is taped, were treated to a couple bits of Boom and one major Pow as Fergie strutted her stuff on the sidewalk.

The lead singer of The Black Eyed Peas arrived to the performance in your basic jeans and jacket (seen below), but she appeared a couple hours later in a dress that left very little to the imagination.

What do you think of it? Fergalicious? Or fugly?

Fergie's dress is...

Get up close and personal with Fergie below. Click on each image to enlarge it...

[Photos: Fame Pictures]