Justin Bieber used shower excuse to dodge night out with Rebel Wilson and Kelly Osbourne

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 (Jan16), and asked him if he'd 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 J.Lo's show.

"We thought, 'Let's try and pick him up, like, for realz," Australian actress and comedienne Rebel Wilson told Entertainment Tonight. "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 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," Rebel added. "He was also with another girl... I just felt like I had good game and I did my best."