Justin Bieber is nothing if not a trooper. The Bieb, who was labeled 'a brat' by 'CSI' actress Marg Helgenberger when she discussed the teen's guest spot on the crime procedural in the press, proved that he is a consummate professional by performing a show in Manila on Monday night despite dealing with the crushing effects of a chest infection, reports New York Daily News.

The Bieb, who is coasting through Asia on another leg of his 'My World' tour, tweeted about his illness, posting this tweet: "Sick as a dog ... But the show must go on. got called a trooper. lol. LEGGO."

Bieber performed as scheduled and the only hiccup in the set was the singer taking a few backstage breaks to vomit mid-set. We think "trooper" is certainly the correct term for The Bieb. Marg Helgenberger is probably eating her bratty words. Most of us don't even want to crawl out of bed when sick with stomach ailments, much less perform physically strenuous activity in front of thousands of screaming fans under bright lights and watchful eyes, so big ups to the Bieb for putting his fans first. We hope you're feeling better, Biebs!

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