BOOT... there it is.

Justin Bieber went to Lure nightclub in Hollywood for a party, but got kicked out!

Justin's people called the club earlier in the day to say he would be attending, but they told him he was too young, so he shouldn't come.

He tried sneaking in through the back door, but the rapper Game gave him a shout-out from the stage. After that, he was kicked out of the club.

A source says, quote, "That's when security saw him and escorted him out immediately.  He left right away, he seemed really embarrassed."

Source: Vibe