JESSICA'S FEAR: WILL JUSTIN BRING SEXY BACK WITH CAMERON?

JESSICA'S FEAR: WILL JUSTIN BRING SEXY BACK WITH CAMERON?

JESSICA BIEL instantly lapsed into a green-eyed sulk when she spotted her honey JUSTIN TIMBERLAKE’s ex-longtime squeeze CAMERON DIAZ – who dazzled on the Oscar red carpet.

Gasped Jessica to an insider: “She’s more gorgeous than ever!” Now Jessica’s crying to pals she’s terrified Cameron might get her claws back into Justin when the pair team up for their new film “Bad Teacher.”

Jessica whined to pals: “What if old feelings come back? They’ll be working closely for weeks and weeks…and she adored him!”

Even though Biel’s bleeding inside, she’s playing it cool and not showing her fear to Justin. (Smart girl!)

Reminds me of my scoop that BRAD PITT freaked over ANGELINA JOLIE’s naked shower scene with JOHNNY DEPP...but look on the bright side: Cameron and Justin play schoolteachers and the script calls for just one sexy scene involving something called “dry humping” – which is what Justin admitted to JIMMY KIMMEL was happening in those steamy news photos of the two getting overexcited in the stands at a 2009 Lakers game. So, not to worry, right?