The likes ofSelena Gomez were all on hand to wish Justin Biebera happy Flo Rida also wished Justin a happy birthday, with Lil Wayne adding: "Happy Birthday, slime, the big one-eight. You in the club, slime."
The Wanted also took to Twitter, writing: "@justinbieber Happy birthday mate! Have a wicked day. See you soon."
Amongst all the birthday messages,Gym Class Heroes frontmanTravie McCoy also had some words of wisdom for Justin, telling Fuse: "18, it's a good one man. You can buy cigarettes, but don't start smoking!"
Justin has since commented on turning 18, telling Ryan Secarest on his KIIS-FM radio show: "I feel so much different. I'm just kidding, man. It's been crazy, man. . . . Just the amount of people that have hit me up and giving me birthday wishes. It's been amazing."

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