Sofia Ritchie has been celebrating in style ever since turning 18 on Wednesday. Despite feeling under the weather on her actual birthday, the model made up for it on Friday when she was whisked away by rumoured boyfriend Justin Bieber on his private jet.

A photo posted by Sofia Richie (@sofiarichie) on

In videos posted to her Snapchat account, Sofia showed her and Justin fooling around on the plush plane, with one snap captioned ‘getaway’ and the other, which showed Justin running up and down the aisles captioned ‘mental.’

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Sofia turned 18 on Wednesday and that night she was spotted out with Justin partying at the Doheny Room in Los Angeles. A source told E! News: “Many friends came out for Sofia's birthday. A lot of dancing and celebration went down. She was fully taken care of with whatever she wanted. Justin was there but they were not acting overly PDA.”

But her celebrations were nearly ruined as she was taken ill the day before she turned 18. In a Snapchat video on Tuesday she told her followers: “Of course I'm sick day before my birthday...Anything else want to go wrong?”

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Sofia and Justin appear to be spending a lot of time together recently, but things aren't said to be too serious between the pair. A source told People last week: “Sofia and Justin are basically on a love-fest right now, but it's virtually impossible where he's at in his life and career for anything to last with these girls. These girls all go crazy for him, but he's not settling down.”