Justin Bieber Angers X Factor Viewers, Accused of "Terrible" Miming

After spending Thanksgiving in New York City, Justin Bieber crossed the Atlantic this weekend and gave fans in Great Britain a treat...
... but many felt as if they'd been tricked.
The 16-year old icon performed on X Factor in England, though the Twitter-verse lit up soon after his appearance with talk that Justin ripped off British viewers by "miming" his renditions of "Baby" and "Somebody to Love." Tweeted a couple followers:
I am a massive fan of Justin Bieber - just pretty gutted he mimed on The X Factor!... Justin Bieber = Justin Mimer! Terrible performance on X Factor!
Do you agree with these assessments? Watch the following performance video, which is followed by an interview Bieber gave on the show:

Justin Bieber on X Factor