Jennifer Lopez threw a temper tantrum on her 40th b-day

This story from Gatecrasher cracked me up, but not because Jennifer threw a little temper tantrum. I actually would have thrown a fit' if I were in Jennifer's place too - she was upset when people were late to her 40th birthday party. It was some kind of intimate' sit-down dinner, and late-comers were still coming in at midnight. That would have hacked me off big time - so no judgment on Jennifer for that. What cracked me was the revelation that Marc Anthony's nickname for Jennifer is Lola'. As in, Whatever Lola wants... Lola gets...' The birthday party had a formal name, An Evening With Lola'. How could Jennifer not pull the diva act?

Jennifer Lopez was overcome with a variety of emotions at her surprise 40th birthday bash Saturday night - and not all of those feelings were good.

Although the actress' pals showed up at the Edison Ballroom for 'An Evening With Lola' (hubby Marc Anthony's nickname for Lopez) in her honor, La Lopez - who entered the shindig to Sarah Vaughan's 'Whatever Lola Wants' - stayed true to her diva status and 'threw a fit' when some of her guests were late to the exclusive dinner.

'Jennifer's party was very intimate, and there were a noticeable amount of empty seats when the dinner started. Jennifer was really irritated. She was fuming because people were late, and complained about it really loudly to Marc,' said one partygoer, who added, 'Jennifer was visibly upset and embarrassed.

'In the Heights' star 'Javier Munoz was the only person who gave advance notice that he was going to be late, because he was doing a show on Saturday night,' the insider continued. 'But the others had no excuse. Being late is the height of rudeness, and guests were still arriving at midnight.'

Among those latecomers were Alicia Keys and boyfriend Swiss Beatz. Those who turned up on time - and thus remained in Jenny From the Block's good graces - included Ricky Martin, Liza Minnelli, Leah Remini, L.A. Reid, Gayle King, O'Neal McKnight, her 'Backup Plan' co-star Alex O'Laughlin and manager Benny Medina.

And although most of her good pals attended the fete, the mole claims that Lopez was upset that best friends Tom Cruise and Katie Holmes didn't attend - they were busy hanging out with David and Victoria Beckham in L.A.

Despite the snafus, Jennifer and her guests had a blast. Anthony took to the stage to croon a special song in Spanish, and a grateful Lopez continually burst into tears of happiness.

Says a second source, 'Everyone at the party was dancing until well after midnight, especially Gayle King! Benny Medina had to change his shirt he worked up such a sweat on the dance floor, and Swiss Beatz did a special rap just for J.Lo.'

As for Lopez herself, says our first insider, 'After Jennifer got over her initial irritation, she let go and looked like she was having the time of her life, drinking champagne and partying until 4 a.m. It was definitely a good way to kick-start her 40s.'

[From Gatecrasher]

Yeah, it sounds like a nice party. I'm glad Jennifer didn't get too bogged down with latecomers. Who in the world comes to a private dinner party at midnight? Or do I just not roll in those circles? Granted, my idea of a private dinner party' is eating chicken nuggets on a real plate while watching NCIS. What was Oprah's BFF Gayle King doing there? I had no idea Gayle and Jennifer were friends. But I suppose when Lola invites you to a party, you show up and act like her best friend. Or she'll cut you.

Images thanks to WENN.com .