What's The Big Frigin' Difference?

Don't let these two almost identical images of Jenna Dewan confuse you ... embrace the challenge here and see if you can pick out the sneaky switches that have been made to this tricky pic!

The expecting mama was spotted at a Christmas tree lighting in Los Angeles, California earlier this month ... and we're getting you into the spirit by giving you double the fun! Take a really good look at these two pics and see if you can figure out the differences between these two super similar snaps!