Kelly Osbourne (left) is in great shape, but her sheath clings too much, producing a lumpy look. Michelle Trachtenberg's A-line Jenny Packham flaunts the star's curves without squeezing.

The winner: Michelle

Kelly and Michelle aren't the only stars sporting look-alike looks. For more photos, pick up the latest issue of Life & Style, on newsstands now!

Photo Credit: Startraks; Celebrity Photo