Jennifer Lopez was spotted crying on a balcony in Miami Beach, fuelling speculation that she was arguing with estranged husband Marc Anthony.

The American Idol judge sat outside in a chair alone as she appeared to have a difficult conversation on her mobile. Jennifer occasionally removed her dark sunglasses to wipe the tears from her eyes.

Earlier in the day, Jennifer stepped out onto the balcony with boyfriend Casper Smart and the two stared out at the view and admired the rainbow that was in the distance.

The pair had been spotted the night before enjoying a romantic dinner with her manager Benny Medina and singer Enrique Iglesias. 

Jennifer has been rumoured to be reconciling with Marc, but she insists they are just friends. Do you think Marc was on the other end of the phone? 

Jennifer Lopez and Casper Smart hold hands following romantic dinner...