Jennifer Lopez takes her preggo belly out for a spin

Has the sperm of Marc Anthony struck again?   JLo turns 40 this week, but her biological clock keeps on ticking!  The mother of twins was spotted with a new baby bump on the set of ‘The Back-Up Plan,’ but it turns out it’s just part of the script.  In the new flick, Jennifer plays a single woman who decides to start a family alone through artificial insemination, only to meet the perfect man on the day of the procedure.

That fake belly she’s wearing really had us fooled.  Then again, her cleavage has the glow of motherhood all over it, so we can’t really be blamed for falling for that padding.  At the end of the day, we’re just happy that no more little Marc Anthonys are going to be brought into the world anytime soon.