Justin Bieber is green with envy after news about his ex Selena Gomez went out on a date with One Direction singer Niall Horan in London. According to sources, Justin Bieber allegedly banned the "Come and Get It" singer from his pre-adult birthday bash.

The wild child from Canada apparently wants payback time after Selena Gomez dissed him by going on a date with the equally famous Niall Horan. Despite many girls that have been attached to the "Beauty and a Beat" singer, he is still apparently upset about Selena Gomez going on dates with other men. According to HollywoodLife.com, the 19-year old Canadian pop singer is so furious that he plans to consciously snub Selena from his 20th birthday.

"Justin is planning a huge party for his 20th birthday and he has not invited Selena. He does not want her there after she dissed him by hooking up with Niall, which was not cool according to Justin," the insider revealed further on the news outlet about Justin Bieber's active snubbing of his ex-girlfriend, Selena Gomez.

Will Chantel Jeffries or Jordan Ozuna, the rumored current fling of the soon to-be 20 year old? Chantel Jeffries was with the singer when he was charged with DUI in Miami. The Miami-based had recently accompanied the teen popstar to Panama for some alone time together.

Justin Bieber is allegedly going to make his birthday blast 'the best party' ever to really piss off Selena Gomez.

"There will be plenty of hot chicks there, and let's just say lots of party favors... It's going to be off the hook," revealed the source further.

Meanwhile, Selena Gomez seems to be up for a blossoming friendship (and could-be romance) with the eligible bachelor, Niall Horan. The two were setup on a date by songstress Taylor Swift after the One Direction singer allegedly begged the latter to set him up with the "Come and Get It" singer.

Justin Bieber, on the other hand, is still dealing with all the run-ins he has had with the law. Early this year, Bieber was charged with a DUI incident in Miami. He is also incriminated in a recent egg-pelting incident in a wealthy neighborhood in California.