However, The O2 Arena has confirmed that Bieber is still expected to perform tonight despite his illness.
43091
Justin Bieber still to perform tonight
161362
Justin Bieber to debut music video during World Series
144658
Argentine singer Cacho Castaña remains hospitalized
126605
Justin Bieber joins Taylor Swift on stage
31503
Justin Bieber attacked on stage after angering fans
120965
Justin Bieber 'could be heading for a meltdown'
94042
Justin Bieber shooting new concert movie in Miami
10980
Pop sensation Justin Bieber wraps his Fisker Karma
123858
Justin bieber's just having 'fun'
55806
Justin Bieber collapses during performance:
79210
Bieber still 'learning'
113881
Will Justin Bieber be with Selena Gomez on South America tour?
6707
Justin Bieber wants to act
163850
Justin Bieber agrees to take a paternity test
133532
Justin Bieber keen to try luck in acting
109284
Bill Cosby performing today
122123
Justin Bieber has been shot and killed