Be careful who you Instagram about.
Marlon Wayans, 42, was in for quite the shock when he posted this picture of him next to an "unrhythmic white woman" at the Jay Z and Beyonce On the Run tour in Pasadena Sunday night on his Instagram, not realizing she was actually Australian pop star Delta Goodrem, 29.
Video: Marlon Wayans' Haunted Hollywood Bus Tour
"Man I got the most UNRHYTHMIC WHITE WOMAN dancing next to me at the jay and bay concert... This b**ch dancing to AC/DC," he wrote.
Goodrem -- also well-known for dating Nick Jonas in 2011 -- was a coach on the Australian version of The Voice and also had a hit album in 2003.
After fans took to social media to bash Wayans for his comments, not surprisingly, the comedian refused to apologize.
Goodrem herself took to Twitter to address the now viral photo, poking fun of herself by posting a video of Julia Louis-Dreyfus' Seinfeld character Elaine's awkward dancing.
"All those trippin and Delta is fine," Wayans later tweeted.
Pics: Beyonce's 'On the Run' Stage Styles!