Singer and Actress Jennifer Lopez gave her fans the best post-holiday gift by surprising them with her presence during the screening of her new movie, Boy Next Door.

The screening was presented by Bodylab took place in CineBistro in Miami on a Tuesday night, according to People Magazine.

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Bodylab is a health and fitness brand endorsed by none other than Lopez herself.

After the screening ended, the lights went on. The people in the theater were about to leave when the moderator Pamela Silva Conde, a co-anchor of Univision's "Primer Impacto" announced that J.Lo had arrived.

The audience, which was approximately one hundred people, went "absolutely nuts" over Lopez's surprise appearance.

Most of them shouted J.Lo's name in excitement, as observed by an onlooker.

J.Lo invited the audience to a question and answer portion and fans immediately took out their phones for documentation.

In the question and answer portion, Lopez verbalized that the "Boy Next Door" filming only took 23 days and it was under a "micro budget" of $4 million, as compared to her previous films.

Lopez also shares her secret of maintaining a great figure as a mom with a demanding schedule that it was all about balance.

Lopez further added that although there's no solution in a bottle, she does start the day with a Berry Berry Good Smoothie from Bodylab.

J. Lo's next project will be hosting a marathon of Oxygen's Snapped on January 18, with co-star Ryan Guzman.

The Boy Next Door movie will hit theaters on January 23.

TagsJennifer Lopez, Boy Next Door Screening