'Bieber's a hater': UFC star Nate Diaz 'slaps' Justin Bieber in Instagram post after Canadian singer criticized his 'terrible' style

By Rachel Mcgrath For Dailymail.com

Published: 17:27 EST, 8 March 2016 | Updated: 18:17 EST, 8 March 2016

Justin Bieber has been given a virtual 'slapping' by UFC star Nate Diaz.

The California fighter took umbrage at the Canadian's criticism of his 'terrible' style in his victory over Ireland's Conor McGregor at UFC 196 in Las Vegas on Saturday.

In response, Diaz posted artwork on his Instagram that shows him hitting Bieber across the face as he tells him: ' Shut you b***h a** up!!!!!'

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Fighting back: UFC fighter Nate Diaz posted this artwork on his Instagram on Tuesday in response to Justin Bieber who said on social media that Diaz's fighting style was 'terrible'

Fighting back: UFC fighter Nate Diaz posted this artwork on his Instagram on Tuesday in response to Justin Bieber who said on social media that Diaz's fighting style was 'terrible'

Feud: Bieber, who turned 22 on March 1, has not yet responded to 30-year-old Diaz about his virtual 'slapping'
Feud: Bieber, who turned 22 on March 1, has not yet responded to 30-year-old Diaz about his virtual 'slapping'

Feud: Bieber, who turned 22 on March 1, has not yet responded to 30-year-old Diaz about his virtual 'slapping'

Diaz, 30, captioned the picture: 'Bieber's a hater.'

After the second round defeat of McGregor by underdog Diaz, the Baby singer posted a video clip of him and his pals drinking a toast to the UFC Featherweight champion.

The 22-year-old wrote in the caption: 'Conor is a true champion, fights with style and finesse, all the respect to Nate but his style is terrible.'

He hasn't yet made any response to Diaz's take down. 

Cricism: The Canadian pop star wasn't impressed with the way Diaz beat Conor McGregor at UFC 196 in Las Vegas on Saturday

Cricism: The Canadian pop star wasn't impressed with the way Diaz beat Conor McGregor at UFC 196 in Las Vegas on Saturday

Provocative: The baby singer shared a video clip Saturday of himself and some pals raising a toast to McGregor whom he called 'a true champion' who 'fights with style and finesse'

Provocative: The baby singer shared a video clip Saturday of himself and some pals raising a toast to McGregor whom he called 'a true champion' who 'fights with style and finesse'

Bieber has been spending time with friends after marking his 22nd birthday with a star-studded party in LA on February 27.

His 'non-exclusive' girlfriend Hailey Baldwin, 19, was there along with his rumored Fall fling Kourtney Kardashian, Kylie Jenner, Ashley Benson, Joe Jonas, Diddy and The Game. 

He spent his actual birthday - March 1 - at Bear mountain Ski Resort at Big Bear Lake in California, where he was spotted snowboarding and drinking beer. 

But on Wednesday it's back to work for the star as he begins his Purpose World Tour in Seattle.

The final concert in the series will be in London on November 29. 

Going on the road: The pop star kicks off his Purpose World Tour on Wednesday night in Seattle, Washington

Going on the road: The pop star kicks off his Purpose World Tour on Wednesday night in Seattle, Washington

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