The stars Justin Bieber stood up in Las Vegas

Singer Justin Bieber didn't show up to party with Rebel Wilson and Kelly Osbourne in Vegas. Photo / Getty

Rebel Wilson and Kelly Osbourne were stood up by Justin Bieber in Las Vegas.

The girls met the pop star at the first night of Jennifer Lopez's Planet Hollywood residency earlier this month, and asked him if he'd be interested in joining them for a night out.

The What Do You Mean? singer said he would but had to take a shower first, after Lopez's show.

"We thought, 'Let's try and pick him up, like, for realz," Wilson told Entertainment Tonight.

Rebel Wilson got stood up by Justin Bieber. Photo / Getty

"We wrote him a note: 'Dear Justin, will you take us out after the show? Tick yes or no'. He ticked yes six times.

"He said, 'Ah, I just have to go and have a shower and I'll meet up with you guys later'."

But he was a no show as the girls waited by the phone in their hotel suite: "We go back to Kelly's hotel room and wait and then he never came," Wilson said.

"He was also with another girl... I just felt like I had good game and I did my best."