Jennifer Lopez's new beau says their haters are "crazy".

The singer and her backing dancer Casper Smart are jetting off to Morocco to perform at the opening of a new mall in Casablanca.

The 24-year-old took to Twitter to answer some of the complaints about his relationship with the American Idol judge.

"I don't understand how people can speak on other people or things they know nothing of??!!! CRAZY Off to Morocco!!!! " he wrote.

Many critics have argued that Casper and the mom-of-two got together too quickly after her break up from third husband Marc Anthony.

Casper was quick to retweet any supportive messages from fans.

"Why are ppl judging at Caspersmart no 1 knows how long at JLo was separated be4 she announced the divorce ppl need 2 stop being so quick 2 judge," tweeted at Prettyboymiguel.

"I think at Caspersmart an at JLo make a really good couple but you know everyones gonna hate cuz when your happy or successful ppl have to hate," he continued.

The couple are only making a quick stop in the Morocco.

Jennifer is due to travel to South America to film her new reality television show Q'Viva! The Chosen with her estranged husband Marc Anthony.