Jennifer Lopez Reveals How She Learned to Love Herself

Jan. 22, 2015— -- Jennifer Lopez still has the moves--and the body--of a 20-year-old, but at 45 she finds it's tougher to bounce back.

"I think for me, because I still do a lot of shows and things like that, my body is different," she told the "Dr. Oz Show" during an appearance that airs Friday. "I feel like I'm better in the sense that I can do everything I did in my 20s better now. But I have a bad neck from injuries and my lower back from all the heels all the time. It's just the different things that start aching a little bit, like when I wake up in the morning. I'm like this is new. It's just those type of things that's been my kind of issue lately."

But with age has come wisdom, especially after her twins, Emme and Max, with ex-husband Marc Anthony, were born.

"My kids came into my life. They changed everything, as they do, because they show you what real, unconditional love feels like," Lopez told host Dr. Mehmet Oz about her 6-year-old twins. "You learn that and then you start thinking about relationships in a different way. All of that happening at the same time got me to the short message of I haven't been taking care of myself or loving myself.

"In a way, and I know that sounds crazy, like 'Oh my god, Jennifer doesn't love herself.' But the truth is when you do love yourself, you don’t allow certain things to happen," the "American Idol" judge continued. "You can't keep blaming everybody else for your relationship and what's happening like, 'Oh, the other person messed up.' It's like, 'No, you're doing something. You're doing something wrong.' So all of that stuff got me to thinking I want to take care of myself better, because I want to be great for my kids."