Back of Turning 40 Is Thrice as Nice For J Lo Jennifer Lopez celebrated her 40th birthday with the cast and crew of The Back-Up Plan on Thursday, and it looks like the partying didn't stop over the weekend. Marc Anthony threw her a private dinner on Friday at NYC's Hotel Griffou, where she arrived decked out in a shiny silver gown. Saturday brought a huge surprise party called "A Night For Lola" — though things turned sour when she apparently got upset some guests were late. While her PR people were busy shooting down rumors Jennifer wanted to replace Paula Abdul on Idol, it looks like she was only focused on marking her latest milestone with Marc. View 15 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 To see more from her parties just . View 15 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Photo 9 Photo 10 Photo 11 Photo 12 Photo 13 Photo 14 Photo 15 Image Source: Bauer-Griffin Online Comments PeachyKeen19 8 years People here are annoyingly mean, she and Mark always celebrate her birthday but this year he made it bigger and added some surprises. Jen is super polite and only one or two people called to say that they would be late the rest didn't, if she was upset by that she got over it pretty quickly. And she is still wonderful... Masiel-Peguero 8 years Jlo looks so good... i love the silver drees she looks so younger i think. With this surprise for her, i think that Marc lover her from the bottom of the heart! jenni5 8 years Her hubby looks very controlling in the pix. Run Jenny Run! jaan_black 8 years she looks slightly young in the silver dress and a day later, like a hag in the white dress...quite the chameleon...and how can you be mad when guests are late to party you didn't know about...riight, she planned it herself b/c she's that self absorbed..she feels a sense of entitlement why? cuz she danced, f***** and whatever else her way out of the hood...womp womp, I hope some people just blew off the party all together Meira 8 years A LONG time ago she used to be hot but now she is just so boring and plain. I dont even know what it is, she doesnt look bad, just not pretty anymore.....her arrogant snobbish attitude has definitely to do with it. They both take themselves way too important. redchick152 8 years ehhh....i don't think a 40 year old needs to be dressing like that anymore, but i do kinda like the silvery dress witht he loose, flowy hair. she should go back to making music and perfume. other than Selena, her movies are CRAPPY. lisa101 8 years make-up lisa101 8 years Her amke-up always looks terrible on the red carpet. Does she have someone new doing it the last few years? Where is the jlo glow? Hesiod 8 years She looks amazing but has diva written all over her tiggerchick2 8 years Ahhhh,poor Jennifer. I feel so bad that only 250 people showed up instead of the 500 invited.- NOT! She is an overhyped snob who needs to just go away! Brangie 8 years I like her silver dress better. Also, I heard that she was upset because she invited 500 people and only about 250 attended. Hockey-Princess 8 years This relationship seems to work for her. She looks content. GlowingMoon 8 years I'm not a fan of those gowns, but I do like the fit. That's exactly how those gowns should fit. spicyaroma 8 years *Jenny spicyaroma 8 years Still got it :) I agree with the first comment, I miss Jeny From The Block. The music wasn't exactly the greatest or artistic, but it was fun and catchy :P Briandiesel 8 years How big of a surprise was it really? I mean she had her hair done, makeup done, and a gown on and fitted. Let's be honest here... billyart101 8 years She's lookin' good, but I miss the days when she was a successful pop star.