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.

To see more from her parties just