Jennifer Lopez ''doesn't know'' if she will marry Casper Smart.

The 'American Idol' beauty admitted she isn't sure if she will walk down the aisle for a fourth time with the backing dancer, who she has been dating since splitting from husband Marc Anthony in 2011.

When asked about marriage at a press conference yesterday (13.01.14), she said: ''I don't know. We'll see. I don't know.

''You know, I've always believed in that institution. I believe in it, but it is difficult. I've had my challenges, but at the same time I believe in love, and I think that is the main thing.''

Jennifer - who took a year away from the 'American Idol' panel last year - also said 2013 was a pivotal time for her, where she learned a great deal about herself.

She added: ''That was such a transformative year for me in so many ways. I had just divorced, I went on tour with the kids [five-year-old twins Max and Emme], and I left 'Idol'. All my security blankets were gone, and I was out there doing something I had never done before.

''[But] I was surrounded by love and family. I really grew. My goal was not to come out the other side and just survive it but grow as a human being as well as an artist, and I felt I did. I learned a lot.''

Reports have suggested Jennifer, 44, and Casper, 26, have been drifting apart recently after a number of heated arguments.