US News

Oops! J.Lo is breast actress

Was it another wardrobe malfunction?

Jennifer Lopez’s plunging neckline had millions of fans who were watching last night’s Academy Awards doing double-takes — and rewinding their DVRs — to see if she had an on-air nip slip.

Lopez — on stage with Cameron Diaz to present awards for Best Costume Design and Best Makeup — was wearing a a crystal-covered dress from designer Zuhair Murad.

As Lopez opened an envelope, it appeared for an instant that she displayed part of her left breast.

COMPLETE AWARDS COVERAGE

‘THE ARTIST’ NABS BEST PICTURE OSCAR

COMMENTARY: BAFFLING WIN FOR ‘THE ARTIST’

FULL LIST OF OSCAR WINNERS

STARS ARRIVE IN STYLE

Fans took to Twitter and Facebook to debate whether the singer and actress had indeed flashed the crowd and viewers at home.

“Anyone else see a little more of Jennifer Lopez than we should have!” posted Twitter user leilajacobson.

The incident even spawned a Twitter account, JLosNipple, which had hundreds of followers within hours.

“I wonder how my friend, the other nipple, feels about this . . . all are not created equal,” one post read.

PHOTOS: OSCARS RED CARPET

PHOTOS: OSCARS’ BEST-DRESSED GOLDEN GIRLS

PHOTOS: STARS TWINKLE AT OSCAR PARTIES

PHOTOS: BACKSTAGE AT THE OSCARS

It could be the most famous wardrobe malfunction since Janet Jackson’s breast was bared during the 2004 Super Bowl halftime show.

Jackson was performing when Justin Timberlake ripped off part of her leather ensemble — and revealed more skin than Jackson said she was expecting.

He apologized by saying it was a “wardrobe malfunction,” giving birth to the phrase.