Jennifer Lopez is hard at work today on her upcoming film The Back-Up Plan filming in Pasadena, California on Monday (June 15). The 39-year-old’s son Max Anthony was also on set while she was filming. Jen has already been working on her next music album, and could be out as early as this year. “I worked on music while I was pregnant and while I was at home, but now to really get into it and focus on it and to finish the project is exciting,” she said. “You can’t help but put not only your kids into it, but to put anything you are going through in your music,” Jen told MTV News on the set of The Back-Up Plan . “That’s the only thing you can really sing or write is stuff that you know. The more music you make and the more that you get into it and the more you write, the more you realize that’s all you can write.” 10+ pictures inside of Jennifer Lopez receiving back-up…

Jennifer Lopez dances and claps to the beat backstage while watching husband Marc Anthony perform at Seminole Hard Rock Hotel and Casino on Thursday (April 9) in Hollywood. On Saturday (April 11), the 39-year-old singer/actress and Marc arrived via private jet into Burbank, Calif. Accompanying the couple were their 13-month twins, Max and Emme , and Marc ’s two sons — Christian , 8, and Ryan , 5. 10+ pictures inside of Hard Rock Hotel hottie Jennifer Lopez …

Jennifer Lopez and Marc Anthony put up a united front, showing off their cute twins Max and Emme on stage at Madison Square Garden on Saturday (February 14) in New York City. The twins will getting so big so fast! They’ll already be turning one-year-old on Sunday, February 22! Earlier in the evening, Marc performed a special Valentine’s Day show at MSG. Jennifer was seen cheering in the crowd like a mad woman with her former manager Benny Medina . And before that, Marc and Jennifer went on a romantic dinner date together . Happy V-Day!