After a long break from the spotlight, new mom Jennifer Lopez is bursting onto the big screen this month in her latest romantic comedy, The Back-Up Plan. But the superstar doesn't call her return to Hollywood a "comeback." "I don't really think of it that way. I was just home, kind of on maternity leave. And now, my first movie's coming out since I was fat!" a now svelte Jennifer, who gave birth to twins Max and Emme in February 2008, laughed at a press conference for her new film in Beverly Hills on March 30. Despite getting back to her old routine, the actress is hardly the workaholic diva of yesteryear. "They come to the door and start yelling, 'No, mommy, mommy don't go.' It's hard!" she adds of leaving her tots at home to promote the flick. She may be a family woman with more than 20 years in the business under her belt, but Jennifer doesn't feel as though she's changed. "I feel now like I'm 25 again and that it's all starting over. With the babies, I feel like my life is just beginning," the 40-year-old said.