It's his party and he will do what he wants to. Justin Bieber turns 20 years old on March 1 and has prepared a heck of a party for himself and his dear friends. He has also made it clear that his ex, Selena Gomez, is not invited and is actually banned from entering the birthday bash.

You read correctly folks, after all of the girls the "Boyfriend" singer has thrown in Selena Gomez's face, he is furious about her going on a few dates with One Direction's Niall Horan. "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," an insider told HollywoodLife.com.

Seems like the "Come and Get it Singer" failed to understand that while JB was running around with Jordan Ozuna, Chantel Jeffries, Brazilian escorts and the endless amounts of other girls... she was suppose to sit around and wait.

If you really think about it, why would Selena want to attend his party in the first place? A source reveals that the birthday extravaganza will consist of "plenty of hot chicks" and "party favors." Why would Selena want to be around alcohol, drugs and well, other "chicks?" Even though Selena doesn't seem to want to start anything serious with Niall Horan, staying away from Justin, especially after rehab, might be the best thing for her.

Here's some advice for Selena: on March 1, put your "Freakum Dress" on, get your girls together and have the best night out ever! Let Justin taste a little of his own medicine for a change and experience how it feels to see someone you care about with someone else. Oops... was that too fierce?

What do you think about Justin's decision to exclude Selena from his Birthday Bash?