Justin Bieber is sick on stage during Arizona gig

Bieber fever ... Justin vomits on stage

The Baby singer doubled over and threw up twice during the latest gig on his Believe tour, in Glendale, Arizona, on Saturday night.

After leaving the stage and returning, he apologised to the audience and carried on with the show.

The 18-year-old star later tweeted a picture of himself in bed with the words: “Great show. Getting better for tomorrow’s show !!!! Love u.”

Chuck ... Justin Bieber throws up on stage

He added: “And … Milk was a bad choice! Lol” The teen sensation was back on stage in Las Vegas last night as his 45-city tour continued.

Seems he has managed to get over his own bout of Bieber fever.

Justin bed ... Justin's night time Twitter pic

ZAMZAM!