Justin Timberlake denies knowledge of Janet Jackson Insta snub after viral screenshot.

Justin Timberlake has denied knowing his management would send Janet Jackson a sassy Instagram message using his own handle, after screenshots of the snub went viral.

Justin hasn't spoken to Janet since their controversial Super Bowl performance in 2004, in which a wardrobe malfunction meant he exposed her nipple to millions of viewers across the world.

Despite his public apology last month, Janet is yet to accept it - leading Justin's manager Johnny Wright to take it upon himself to provoke Janet into responding.

After she wrote a message urging her followers "to love, not to hate", Johnny used Justin's Instagram account to leave her a savage message in the comments.

"Always choose to heal, not hurt. To forgive, not to despise. To persevere, not to quit. To smile, not to frown. And to love, not to hate," Janet had quoted.

In response, fans noticed 'Justin Timberlake' had written underneath it: "You should take this advice and to apply it to your relationship with Justin."

The comment was eventually deleted, but not before screengrabs were taken and circulated around social media.

However, Justin has reportedly denied any knowledge of the exchange, with an insider telling New York Post's Page Six: "Justin was not aware of his comment to her. Johnny did this all on his own."

Earlier this year, Justin Timberlake apologised for his role in the controversial 2004 Super Bowl performance.

As the spotlight falls on the way famous women were treated in the early Noughties, Justin has had to do a bit of grovelling of late - not least to his ex-girlfriend Britney Spears, who he'd previously blamed multiple times for their split.

In his recent open letter, Justin apologised both to Britney and Janet, saying he "fell short" and "benefited from a system that condones misogyny and racism".

"I specifically want to apologize to Britney Spears and Janet Jackson both individually, because I care for and respect these women and I know I failed. I also feel compelled to respond, in part, because everyone involved deserves better and most importantly, because this is a larger conversation that I whole heartly want to be part of and grow from," he went on.

"The industry is flawed. It sets men, especially white men, up for success. It’s designed this way. As a man in a privileged position I have to be vocal about this. Because of my ignorance, I didn't recognize it for all that it was while it was happening in my own life but I do not want to ever benefit from others being pulled down again."

Justin Timberlake and Britney Spears.

Janet has only spoken once about the Super Bowl incident that nearly left her career in tatters, telling Oprah Winfrey in 2006 that her 'friend' Justin hadn't talked to her since it happened.

"All the emphasis was put on me. Not on Justin," she told Oprah.

"Justin…We were friends. And not that we, we aren't…we haven't spoken, but I consider him a friend, and I'm very loyal, and friendship is very important."

She added: "I think they did put all the emphasis on me. And as opposed to us.

"I have to say just to let people know that Justin has reached out - we haven't spoken, but he has reached out to speak with me - and, like I said, friendship is very important to me and certain things you just don't do to friends.

"In my own time, I'll give him a call."