Don't turn around, Jennifer Lopez! There's a creeper right behind you!
J. Lo and her man Casper Smart walked hand-in-hand down the sidewalk in Beverly Hills on Tuesday, trying to get away from this photobomber!
That guy looks like he just got done shooting a scene on Boardwalk Empire!
Srsly dude, what is up with those formal threads???
If Jenny from the Block did turn back around, she would have yelled, "________________!!!"
[Image via VLUV / Splash News.]