Singer actress Jennifer Lopez has denied rumours that she is back with her ex-boyfriend Casper Smart. “I'm single right now,” the 45 years old said at a promotional event for her forthcoming film “The Boy Next Door” here. “ I think being on my own has been really great for me,” Lopez told Us Weekly magazine. “There was a time where I was just like'Ehhh, I'm getting back into the mix. For right now, I just have no announcements to make,” she added.Lopez and Smart started dating in 2011 after her split from then-husband Marc Anthony. The singer and Smart split in summer 2014.