She might be known as a lot of things, but according to actor Ryan Guzman, Jennifer Lopez has the energy of an Energizer Bunny.

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Guzman, who stars with the singer and actress in the upcoming The Boy Next Door, says that working with Lopez has not only been one of the best experiences of his career, but one of the most fast-pace too.

According to The Huffington Post on Wednesday, Guzman told Variety Latino, "You learn so much when you work with Jennifer Lopez 'cause she just does everything. While we were filming she was writing a book, she was working on her album, she was doing 'American Idol' and still being a mom of two. I was like 'Jen, you need to slow down you're going to tire yourself out,' but that woman is an Energizer bunny. She just never stops, and I learned that that work ethic is why she's made it to where she is."

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Meanwhile, it's been reported that Lopez held up production of her latest music video shoot because she was five hours late to the set.

According to the New York Daily News on Tuesday, Lopez held up production of her latest music video, Stressin' because of her diva-like ways. Sources say that shooting didn't even start until one hour before the production was supposed to end.

An insider tells the website, "Lopez was supposed to show up at the shoot at the Griffin at 9 a.m. but she didn't actually arrive until 2 p.m. They were supposed to be at the Bronx location by 5 p.m., and they didn't make it up there until 9 p.m. By the time they were at the Bronx location, Fat Joe was pretty mad. I don't know if he was specifically mad about Jennifer, but the time crunch made everything more stressful."

What's more, Lopez is also being accused of costing a lot of money for being late as the music video features a large cast of extras dancing as Lopez sings from the top of a banquette, making it Fat Joe's most expensive project to date.

Tags: Jennifer Lopez