Could fourth time be a charm for Jennifer Lopez? That's what the tabloid media is speculating as there is a new rumor that says Lopez is looking to tie the knot with her on-again, off-again beau, Casper Smart by the end of this year.

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According to VH1 on Friday, there's a good chance that Lopez might be tying the knot once again as things have been heating up between her and Smart so much so that they are rumors to be engaged. The two were recently seen together at the Billboard Latin Music Awards and the Mayweather vs. Pacquiao fight last weekend.

Of course, Lopez hasn't commented on her relationship with Smart, instead insisting that she is single. She broke up with him back in June of last year after dating for nearly three years.

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Meanwhile, according to Refinery29 last week, the 45-year-old mother-of-two is promoting her lifestyle brand BodyLab with a #BeTheGirl weight-loss challenge that involves a personalized fitness and nutrition plans including easy, healthy recipes and motivation from the Hollywood star herself. The program involves a detox and cleanse plus a fat burner containing a 7-Day Ultra-Fast Slim Kit.

In addition, there will also be weekly prizes at the end of the challenge with participants getting their chance to win a special "NYC Prize Package" along with a chance to meet Lopez herself.

Tags: Jennifer Lopez