Jennifer Lopez made a surprise appearance on Tuesday at a State Island elementary school for autistic children performing for the first time since giving birth.

The singer, who welcomed twins Max and Emme just four months ago, was impressed by the letters she received from a group of eight 10-and-11-year-old students at Public School 37 and she decided to drop by on their graduation day and perform her hit song, "Let's Get Loud," silve.com reported.

According to their teacher, Kathy Amati, the kids fell in love with the 38-year-old's song and watched it every day for the last couple of months, learning the lyrics and dance moves it in.

"The kids don't even really understand how famous she is," said Ms. Amati. "They just really like her singing and dancing."

Encouraged by Amati, the children wrote Lopez, hoping for pictures or an autograph, but instead, the singer decided to come meet them on their graduation. A rep for Lopez called in to learn the details about the ceremony and the only people who knew ahead of time were the students, their teacher, paraprofessional Rose Mondella and P.S. 37 principal Bill Fiorelli.

It's always refreshing to see that motherhood is having such a positive effect on Lopez who is renowned for her "divaness."