The power pop couple was performing at Brooklyn's new Barclay's Center when the musical mishap occurred.
As Beyonce took to the stage to perform 'Crazy in Love' which Jay-Z features on, the rapper became distracted by his wife on the screen backstage, missing his cue for his mid-way rap.
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Jay-Z was then heard saying over the sound system: "Oh s***, I should probably rap here."
Not that we can blame the man considering what his wife was wearing.
Beyonce graced the stage dressed in a figure hugging black leather cat suit that reminded everyone why she described herself a 'bootylicious' all those years ago.
Once the song was finished, Beyonce exited the stage but not before Jay-Z cheekily slapped his wife's backside.
Later on, Beyonce returned to the stage to sing 'Young Forever' alongside her husband.
When the song finished, the couple made the crowd go wild as they shared as kiss.
Clearly the two are still 'Crazy in Love' with each other.
Sorry- it was there for the taking.