Justin Bieber: Sick Before Belgium Show

Justin Bieber touches his abs while on stage for his concert on Thursday night (April 11) in Antwerp, Belgium.

The 19-year-old singer wasn’t feeling well earlier in the day, but still stopped to sign autographs for fans when he got off his tour bus.

PHOTOS: Check out the latest pics of Justin Bieber

“Ate something funny. Stomach ain’t right today. Show must go on! Leggo!” he tweeted. “Night 2. Sold Out. Belgium. #BELIEVEtour thank u. Lets do it”

The week before, Justin surprised some of his fans at the adidas NEO Believe Tour Pre-Party in Hamburg, Germany.