AceShowbiz - The only time John Legend sings out of tune might be when he's drunk. The 40-year-old R&B singer was recorded giving a sloppy performance during a visit to Universal Studios with his wife Chrissy Teigen to celebrate Halloween.

John, wearing a bright red onesie with his face plastered all over it, hilariously belted out his hit single "All of Me" off-key. His wife giggled as she watched him from among the crowd. According to the 33-year-old model, he got drunk on wine.

Chrissy posted the video on Twitter and explained to her followers, "John got wine drunk and sang a song at universal studios last night." She said it was supposed to be an incognito performance but the singer ruined it by introducing himself.

"The whole joke was supposed to be that literally no one was watching or at the stage," the mother of two explained, "but then he got on stage and was like ITS ME JOHN LEGEND."

John also shared the clip on his social media. He told his online devotees that the onesie belonged to his wife, the DJ was not keen to play his music, and the performance was dedicated to himself. Despite getting roasted by his wife and fans, he had a good time.

"We went to @unistudios last night to do Horror Nights before they shut it down," he wrote in the caption. "Costume theme was onesies. We bought a few new ones and raided the closet too and found the perfect one for me to wear. Someone made Chrissy a onesie with my face on it and of course I had to wear it. Then I found a reluctant DJ with a mic and serenaded myself. It was a night."

Before going on a date at Universal Studios, Chrissy Teigen and John Legend celebrated Halloween with their two young children. The family channeled Disney characters with mom Chrissy as Maleficent, dad John as her king, little Luna as Sleeping Beauty, and baby Miles as "the owl from Sleeping Beauty but he refused to wear the owl head."