There you have it - Jen vs Jen. An unlikely feud is brewing between Jennifer Lopez and Jennifer Aniston after the singer accused the former Friends actress of stealing the plot idea for her upcoming film, Plan B.

After taking a break from her music and film career to focus on motherhood, J-Lo is making a comeback with in the film about a thirty-something who is desperately trying to become pregnant. But according to sources, she is angry that Aniston is set to star in a movie with an almost identical plot, called The Baster.

“The last thing J-Lo wants is to have Aniston overshadow her. There’s been some mud-slinging, with J-Lo claiming Jen (Aniston) took her idea,” says the source.

We’ll have to see how this story turns out.

Victoria Beckham, Katie Holmes and other top celebs hit up Cecconi’s, one of Hollywood’s hottest restaurants. Also spotted at the swanky eatery were Eva Longoria Parker and Jennifer Lopez.

Across town at My House, the cameras caught Leonardo DiCaprio and Marc Anthony leaving the club together. Lindsay Lohan was also spotted at the venue but shied away from the cameras.

Christina Applegate delighted fans by signing autographs outside Jimmy Kimmel’s show, while Paul McCartney was spotted after dining at Madeo.

“Heroes” star Hayden Panettiere waved to the paparazzi while bundled up for an L.A. cold spell.

According to reliable sources, Jennifer Lopez and Marc Anthony have renewed their wedding vows.

The couple, who have been married for four years, took part in a vow renewal ceremony at 3:15 a.m. Sunday morning at Caesars Palace in Las Vegas.

Read More:

J-Lo and Marc Renew Vows - ETOnline.com

Jennifer Lopez is back in shape - and how! Barely seven months after giving birth to twins, J-Lo showed off her shapely post-pregnancy body by competing in the triathlon in Malibu, CA.

The 39 year old singer finished the gruelling event which included running, swimming and biking in 2 hours, 23 minutes and 28 seconds. Her husband, Marc Anthony, was on the sidelines, cheering her on. There were several other celebrities who participated in the race, including actors Matthew McConaughey and Jon Cryer.

Update:

J-Lo and family left soon after to reportedly celebrate Marc’s 40th birthday at a New York Hotel.