Justin BieberPop star Justin Bieber fell so sick while performing in Manila, Philippines yesterday (May 10) that he vomited between songs, but insisted that the show must go on.

Reportedly, Bieber was diagnosed with a severe chest infection and was told to either cancel the show all together, or perform a shorter set. before the show, Bieber tweeted to his fans, "sick as a dog...but the show must go on. got called a trooper. lol."

The hard-working superstar agreed to an abbreviated show, but once he hit the stage, refused to let his fans down and just kept on singing and dancing away.