Then you're going to LIVE for this video!!!
She's gone undercover -- and she OWNS it!
Ch-ch-check out the video for Birthday here (above)!
We're hearing that Jennifer Lopez is not only pregnant but she's also carrying twins!!!
The Puerto Rican diva looked lovely in a tent dress on Tuesday, to conceal a growing baby bump.
La Lopez and her husband, Marc Anthony, paid a visit to PS 36 grade school in the Bronx to announce their joint En Concierto kickoff tour.