Bella Thorne shut down a theme park for her 18th birthday.

The 'Blended' star celebrated the milestone with exclusive access to California's Six Flags Magic Mountain amusement park with 50 of her closest pals including boyfriend Gregg Sulkin.

Sharing a group picture from the night where everyone is wearing tops with the words 'Happy Birthday Bitch' printed on, she captioned it: ''Shut down Six Flags last night like....... @sixflagsmagicmountain @wildfoxcouture (sic)''

And the 18-year-old beauty isn't afraid of doing things differently after she previously revealed she would happily wear a bath robe on the red carpet instead of a designer gown.

Discussing catwalk trends, she said: ''I love the infinity scarves coming and the colours coming in are very interesting. I love the mustard yellows and the olive greens.

''You know what I wish though? That people would make it so robes were fashionable because all I do is wear a robe. I showed up in one today, I wore them throughout the movie ['The DUFF']. You have to pry it off me.

''I used to think that I couldn't wear pink but I have found that you can wear pink. Find a shade that compliments both your hair and skin colour. For me, the blush pinks work best. I also find that with red hair, the less makeup you wear, the better.''