Justin Bieber "Short of Breath" after London String of Shows

Justin Bieber

With another stressful week in the books, Justin Bieber arrived back to his hotel after performing at the O2 Arena in London on Friday (March 8).

The “Beauty and a Beat” singer looked a little harried as he fought through the crowds to get back to the safety and privacy of his room.

With a busy tour schedule taking its toll, on Friday the 19-year-old pop star tweeted, “still a little short of breathe tonight but was an incredible show. London fans go hard! 4 SOLD OUT O2 shows in a row!! #BLESSED.”

On Thursday, the Biebs collapsed on stage during his previous show at the O2 Arena, where he (coincidentally) stopped to get some oxygen backstage before continuing.

However, back to his perky self, later Justin tweeted, “Happy International Women”s Day….hello ladies ;).”